diff --git a/frontend/src/components/Contributions/ContributionForm.vue b/frontend/src/components/Contributions/ContributionForm.vue
index 37c7b72ec..6b36c29fe 100644
--- a/frontend/src/components/Contributions/ContributionForm.vue
+++ b/frontend/src/components/Contributions/ContributionForm.vue
@@ -7,40 +7,42 @@
     >
       <ValidatedInput
         id="contribution-date"
-        :model-value="formValues.date"
+        :model-value="date"
         name="date"
         :label="$t('contribution.selectDate')"
         :no-flip="true"
         class="mb-4 bg-248"
         type="date"
-        :rules="validationSchema"
+        :rules="validationSchema.fields.date"
         @update:model-value="updateField"
       />
-      <div v-if="showMessage" class="p-3" data-test="contribtion-message">
+      <div v-if="noOpenCreation" class="p-3" data-test="contribtion-message">
         {{ noOpenCreation }}
       </div>
       <div v-else>
-        <input-textarea
+        <ValidatedInput
           id="contribution-memo"
-          :model-value="formValues.memo"
+          :model-value="memo"
           name="memo"
           :label="$t('contribution.activity')"
           :placeholder="$t('contribution.yourActivity')"
-          :rules="validationSchema"
+          :rules="validationSchema.fields.memo"
           @update:model-value="updateField"
+          textarea="true"
         />
         <ValidatedInput
           name="hours"
-          :model-value="formValues.hours"
+          :model-value="hours"
           :label="$t('form.hours')"
           placeholder="0.01"
           step="0.01"
           type="number"
-          :rules="validationSchema"
+          :rules="validationSchema.fields.hours"
           @update:model-value="updateField"
         />
         <LabeledInput
           id="contribution-amount"
+          :model-value="amount"
           class="mt-3"
           name="amount"
           :label="$t('form.amount')"
@@ -79,48 +81,63 @@
 </template>
 
 <script setup>
-import { ref, computed } from 'vue'
+import { reactive, computed, watchEffect, watch, ref } from 'vue'
 import { useI18n } from 'vue-i18n'
-import InputTextarea from '@/components/Inputs/InputTextarea'
 import ValidatedInput from '@/components/Inputs/ValidatedInput'
 import LabeledInput from '@/components/Inputs/LabeledInput'
-import { memo } from '@/validationSchemas'
-import { useForm } from 'vee-validate'
-import { object, date, number } from 'yup'
+import { memo as memoSchema } from '@/validationSchemas'
+import { object, date as dateSchema, number } from 'yup'
 
 const props = defineProps({
   modelValue: { type: Object, required: true },
-  isThisMonth: { type: Boolean, required: true },
-  minimalDate: { type: Date, required: true },
   maxGddLastMonth: { type: Number, required: true },
   maxGddThisMonth: { type: Number, required: true },
 })
 
-const emit = defineEmits(['update-contribution', 'set-contribution'])
+const emit = defineEmits(['update-contribution', 'set-contribution', 'update:modelValue'])
 
 const { t } = useI18n()
-let allFieldsValid = ref(false)
 
-const form = ref({ ...props.modelValue })
+const form = reactive({ ...props.modelValue })
 
-const maxHours = computed(() => Number(props.isThisMonth ? props.maxGddThisMonth : props.maxGddLastMonth / 20))
+// update local form if in parent form changed, it is necessary because the community page will reuse this form also for editing existing
+// contributions, and it will reusing a existing instance of this component
+watch(() => props.modelValue, (newValue) => Object.assign(form, newValue))
+
+// use computed to make sure child input update if props from parent from this component change
+const amount = computed(() => (form.hours * 20).toFixed(2).toString())
+const date = computed(() => form.date)
+const hours = computed(() => form.hours)
+const memo = computed(() => form.memo)
+
+const isThisMonth = computed(() => {
+  const formDate = new Date(form.date)
+  const now = new Date()
+  return formDate.getMonth() === now.getMonth() && formDate.getFullYear() === now.getFullYear()
+});
+
+// const maxHours = computed(() => Number((isThisMonth.value ? props.maxGddThisMonth : props.maxGddLastMonth) / 20))
+// const maxAmounts = computed(() => Number(isThisMonth.value ? parseFloat(props.maxGddThisMonth): parseFloat(props.maxGddLastMonth)))
 
 const validationSchema = computed(() => {
-  // const maxGDD = Number(props.isThisMonth ? props.maxGddThisMonth : props.maxGddLastMonth)
-  // const maxHours = Number(maxGDD / 20)
-  console.log('compute validationSchema', { maxHours })
+  const maxHours = Number((isThisMonth.value ? props.maxGddThisMonth : props.maxGddLastMonth) / 20)
+  const maxAmounts = Number(isThisMonth.value ? parseFloat(props.maxGddThisMonth): parseFloat(props.maxGddLastMonth))
+
   return object({
     // The date field is required and needs to be a valid date
     // contribution date
-    date: date()
+    date: dateSchema()
       .required('contribution.noDateSelected')
       .min(new Date(new Date().setMonth(new Date().getMonth() - 1, 1)).toISOString().slice(0, 10))  // min date is first day of last month
       .max(new Date().toISOString().slice(0, 10))
       .default(''), // date cannot be in the future
-    memo,
-    hours: number().required('contribution.noHours')
+    memo: memoSchema,
+    hours: number().transform((value, originalValue) => 
+        originalValue === "" ? undefined : value
+      )
+      .required('contribution.noHours')
       .min(0.01, ({min}) => ({ key: 'form.validation.gddCreationTime.min', values: { min } }))
-      .max(maxHours.value, ({max}) => ({ key: 'form.validation.gddCreationTime.max', values: { max } }))
+      .max(maxHours, ({max}) => ({ key: 'form.validation.gddCreationTime.max', values: { max } }))
       .test(
         'decimal-places',
         'form.validation.gddCreationTime.decimal-places',
@@ -129,78 +146,40 @@ const validationSchema = computed(() => {
           return /^\d+(\.\d{0,2})?$/.test(value.toString())
         }
       ),
-  })  
-})
-const {
-  values: formValues,
-  meta: formMeta,
-  resetForm,
-  setFieldValue,
-} = useForm({
-  initialValues: {
-    date: props.modelValue.date,
-    memo: props.modelValue.memo,
-    hours: props.modelValue.hours,
-    amount: props.modelValue.amount,
-  },
-  validationSchema: validationSchema.value,
+    amount: number().max(maxAmounts)
+  })
 })
 
 const updateField = (newValue, name) => {
   if (typeof name === 'string' && name.length) {
-    setFieldValue(name, newValue)
+    form[name] = newValue
+    if (name === 'hours') {
+      form.amount = (newValue * 20).toFixed(2).toString()
+    }
   }
-  if (name === 'hours') {
-    setFieldValue('amount', (newValue * 20).toFixed(2).toString())
-  }
-  /*
-  validationSchema.value.validateAt(name, formValues)
-  .then(() => {
-    allFieldsValid = true
-  })
-  .catch((e) => {
-    allFieldsValid = false
-    console.log('validation error')
-    console.log(JSON.stringify(e, null, 2))
-    //errorMessage = e.message
-  })*/
+  console.log('update field', { newValue, name, form, amount: amount.value })
+  emit('update:modelValue', form)  
 }
 
-const showMessage = computed(() => {
-  if (props.maxGddThisMonth <= 0 && props.maxGddLastMonth <= 0) return true
-  if (props.modelValue.date)
-    return (
-      (props.isThisMonth && props.maxGddThisMonth <= 0) ||
-      (!props.isThisMonth && props.maxGddLastMonth <= 0)
-    )
-  return false
-})
-
-const disabled = computed(() => {
-  return !allFieldsValid 
-  /*
-  return (
-    !formMeta.value.valid ||
-    (props.isThisMonth && parseFloat(form.value.amount) > parseFloat(props.maxGddThisMonth)) ||
-    (!props.isThisMonth && parseFloat(form.value.amount) > parseFloat(props.maxGddLastMonth))
-  )*/
-})
+const disabled = computed(() => !validationSchema.value.isValidSync(form))
 
 const noOpenCreation = computed(() => {
   if (props.maxGddThisMonth <= 0 && props.maxGddLastMonth <= 0) {
     return t('contribution.noOpenCreation.allMonth')
   }
-  if (props.isThisMonth && props.maxGddThisMonth <= 0) {
-    return t('contribution.noOpenCreation.thisMonth')
+  if (form.date) {
+    if (props.isThisMonth && props.maxGddThisMonth <= 0) {
+      return t('contribution.noOpenCreation.thisMonth')
+    }
+    if (!props.isThisMonth && props.maxGddLastMonth <= 0) {
+      return t('contribution.noOpenCreation.lastMonth')
+    }
   }
-  if (!props.isThisMonth && props.maxGddLastMonth <= 0) {
-    return t('contribution.noOpenCreation.lastMonth')
-  }
-  return ''
+  return undefined
 })
 
 function submit() {
-  const dataToSave = { ...formValues }
+  const dataToSave = { ...form }
   let emitOption = 'set-contribution'
   if (props.modelValue.id) {
     dataToSave.id = props.modelValue.id
@@ -211,14 +190,12 @@ function submit() {
 }
 
 function fullFormReset() {
-  resetForm({
-    values: {
-      date: '',
-      memo: '',
-      hours: 0.0,
-      amount: '',
-    }
-  })
+  form = {
+    date: '',
+    memo: '',
+    hours: 0.0,
+    amount: 0.0,
+  }
 }
 </script>
 <style>
diff --git a/frontend/src/components/Inputs/LabeledInput.vue b/frontend/src/components/Inputs/LabeledInput.vue
index 7fd4a9efe..03442160a 100644
--- a/frontend/src/components/Inputs/LabeledInput.vue
+++ b/frontend/src/components/Inputs/LabeledInput.vue
@@ -1,17 +1,25 @@
 <template>
   <div :class="wrapperClassName">
     <BFormGroup :label="label" :label-for="labelFor">
-      <BFormInput
-        v-bind="$attrs"
-      />
+      <BFormTextarea v-if="textarea" 
+        v-bind="{ ...$attrs, id: labelFor, name }"
+        v-model="model"
+        trim
+        :rows="4"
+        :max-rows="4"
+        no-resize
+        />
+      <BFormInput v-else 
+        v-bind="{ ...$attrs, id: labelFor, name }"
+        v-model="model"
+      />      
       <slot></slot>
     </BFormGroup>
   </div>
 </template>
 
 <script setup>
-import { computed, defineOptions } from 'vue'
-
+import { computed, defineOptions, watchEffect, ref, defineModel } from 'vue'
 defineOptions({
   inheritAttrs: false,
 })
@@ -25,8 +33,27 @@ const props = defineProps({
     type: String,
     required: true,
   },
+  // modelValue: [String, Number, Date],
+  textarea: {
+    type: Boolean,
+    required: false,
+    default: false,
+  }
 })
 
-const wrapperClassName = computed(() => `input-${props.name}`)
+const model = defineModel()
+// const model = ref(props.modelValue)
+/*const model = computed({
+  get: () => props.modelValue,
+  set: (val) => emit('update:modelValue', val)
+})*/
+const wrapperClassName = computed(() => props.name ? `input-${props.name}` : 'input')
 const labelFor = computed(() => `${props.name}-input-field`)
+
+// const emit = defineEmits(['update:modelValue'])
+
+watchEffect(() => {
+  console.log(`${props.name}: ${props.modelValue}`)
+  // model.value = props.modelValue
+})
 </script>
diff --git a/frontend/src/components/Inputs/ValidatedInput.vue b/frontend/src/components/Inputs/ValidatedInput.vue
index 3e25bda6e..1310585a2 100644
--- a/frontend/src/components/Inputs/ValidatedInput.vue
+++ b/frontend/src/components/Inputs/ValidatedInput.vue
@@ -3,96 +3,82 @@
     v-bind="$attrs"
     :min="minValue"
     :max="maxValue"
-    :model-value="currentValue"
+    :model-value="model"
     :reset-value="resetValue"
     :locale="$i18n.locale"
     :required="!isOptional"
-    :label="props.label"
-    :name="props.name"
+    :label="label"
+    :name="name"
     :state="valid"
-    @input="updateValue($event.target.value)">
+    @update:modelValue="updateValue"
+    >
     <BFormInvalidFeedback v-if="errorMessage">
-        {{ $t(translatedErrorString) }}
+        {{ errorMessage }}
     </BFormInvalidFeedback>
   </LabeledInput>
 </template>
 
 <script setup>
-import { computed, ref } from 'vue'
-import LabeledInput from './LabeledInput'
+import { computed, ref, watchEffect, watch } from 'vue'
 import { useI18n } from 'vue-i18n'
-import { isLanguageKey } from '@/validationSchemas'
-import { useField } from 'vee-validate'
+import LabeledInput from './LabeledInput'
+import { translateYupErrorString } from '@/validationSchemas'
 
 const props = defineProps({
-  errorMessage: [String, Object],
   label: {
     type: String,
     required: true,
   },
-  modelValue: [String, Number],
+  modelValue: [String, Number, Date],
   name: {
     type: String,
     required: true,
   },
   rules: {
     type: Object,
-    default: () => ({}),
+    required: true,
   },
 })
+const model = ref(props.modelValue)
+let wasUpdated = false
 
-let valid = ref(false)
-let errorMessage = ref('')
-let currentValue = ref(props.modelValue)
+function updateErrorMessage() {
+  try {
+    props.rules.validateSync(model.value)
+    errorMessage.value = undefined
+  } catch(e) {
+    errorMessage.value = translateYupErrorString(e.message, t)
+  }
+}
 
 const { t } = useI18n()
-const translatedErrorString = computed(() => {
-  const error = errorMessage.value
-  const type = typeof error
-  // console.log(error)
-  if (type === 'object') {
-    return t(error.key, error.values)
-  } else if (type === 'string' && error.length > 0 && isLanguageKey(error)) {
-    return t(error)
-  } else {
-    return error
-  }
-})
+const errorMessage = ref()
+const valid = computed(() => props.rules.isValidSync(model.value))
 
 const emit = defineEmits(['update:modelValue'])
 const updateValue = ((newValue) => {
-  // emit('update:modelValue', newValue, props.name)
+  wasUpdated = true
+  model.value = newValue
+  updateErrorMessage()
+  emit('update:modelValue', newValue, props.name)  
+})
 
-  const data = new Object()
-  data[props.name] = newValue
-  
-  const result = props.rules.validateSyncAt(props.name, data)
-  console.log('result: ', JSON.stringify(result, null, 2))
-  /*
-  .then(() => {
-    valid = true
-    console.log("%s is valid, emit event", props.name)
-    emit('update:modelValue', newValue, props.name)
-  })
-  .catch((e) => {
-    valid = false
-    console.log(t(e.message))
-    errorMessage = e.message
-    console.log('max value: %o for name: %s, rules: %o', maxValue.value, props.name, props.rules)    
-  })
-*/  
+// validate on rule change, but only if updateValue was called at least one
+watch(() => props.rules, () => {
+  if(wasUpdated) {
+    updateErrorMessage()
+  }
+})
+// update model if parent change
+watch(() => props.modelValue, () => {
+  model.value = props.modelValue
 })
 
 // extract additional parameter like min and max from schema
-const getDateOnly = (schemaDescription, name) => schemaDescription.fields[props.name].tests.find((test) => test.name === name)?.params[name]
-
 const schemaDescription = computed(() => props.rules.describe())
-console.log(schemaDescription.value)
-const minValue = computed(() => getDateOnly(schemaDescription.value, 'min'))
-const maxValue = computed(() => getDateOnly(schemaDescription.value, 'max'))
-const resetValue = computed(() => schemaDescription.value.fields[props.name].default)
-const isOptional = computed(() => schemaDescription.value.fields[props.name].optional)
-
-// const { value: currentValue, errorMessage, meta } = useField(props.name, props.rules)
-
+const getTestParameter = (name) => schemaDescription.value?.tests?.find(t => t.name === name)?.params[name]
+const minValue = computed(() => getTestParameter('min'))
+const maxValue = computed(() => getTestParameter('max'))
+const resetValue = computed(() => schemaDescription.default)
+const isOptional = computed(() => schemaDescription.optional)
 </script>
diff --git a/frontend/src/pages/Community.vue b/frontend/src/pages/Community.vue
index 6ab7d9875..59d7c283f 100644
--- a/frontend/src/pages/Community.vue
+++ b/frontend/src/pages/Community.vue
@@ -10,9 +10,7 @@
           />
           <div class="mb-3"></div>
           <contribution-form
-            :key="computedKeyFromForm"
             v-model="form"
-            :is-this-month="isThisMonth"
             :minimal-date="minimalDate"
             :max-gdd-last-month="maxForMonths[0]"
             :max-gdd-this-month="maxForMonths[1]"
@@ -95,7 +93,7 @@ const form = ref({
   date: '',
   memo: '',
   hours: 0,
-  amount: '',
+  amount: 20,
 })
 const originalContributionDate = ref('')
 const updateAmount = ref('')
@@ -107,14 +105,6 @@ const minimalDate = computed(() => {
   return new Date(date.setMonth(date.getMonth() - 1, 1))
 })
 
-const isThisMonth = computed(() => {
-  const formDate = new Date(form.value.date)
-  return (
-    formDate.getFullYear() === maximalDate.value.getFullYear() &&
-    formDate.getMonth() === maximalDate.value.getMonth()
-  )
-})
-
 const amountToAdd = computed(() => (form.value.id ? parseInt(updateAmount.value) : 0))
 
 const maxForMonths = computed(() => {
@@ -273,13 +263,20 @@ const handleUpdateListContributions = (pagination) => {
 }
 
 const handleUpdateContributionForm = (item) => {
+  /*Object.assign(form.value, {
+    id: item.id,
+    date: new Date(item.contributionDate).toISOString().slice(0, 10),
+    memo: item.memo,
+    amount: item.amount,
+    hours: item.amount / 20,
+  })*/
   form.value = {
     id: item.id,
     date: new Date(item.contributionDate).toISOString().slice(0, 10),
     memo: item.memo,
     amount: item.amount,
     hours: item.amount / 20,
-  }
+  }//*/
   originalContributionDate.value = item.contributionDate
   updateAmount.value = item.amount
   tabIndex.value = 0
diff --git a/frontend/src/validationSchemas.js b/frontend/src/validationSchemas.js
index fe3ef901e..cbf74d0b8 100644
--- a/frontend/src/validationSchemas.js
+++ b/frontend/src/validationSchemas.js
@@ -1,7 +1,18 @@
 import { string } from 'yup'
 
 // TODO: only needed for grace period, before all inputs updated for using veeValidate + yup
-export const isLanguageKey = (str) => str.match(/^(?!\.)[a-z][a-zA-Z0-9]*([.][a-z][a-zA-Z0-9]*)*(?<!\.)$/)
+export const isLanguageKey = (str) => str.match(/^(?!\.)[a-z][a-zA-Z0-9-]*([.][a-z][a-zA-Z0-9-]*)*(?<!\.)$/)
+
+export const translateYupErrorString = (error, t) => {
+  const type = typeof error
+  if (type === 'object') {
+    return t(error.key, error.values)
+  } else if (type === 'string' && error.length > 0 && isLanguageKey(error)) {
+    return t(error)
+  } else {
+    return error
+  }
+}
 
 export const memo = string()
   .required('contribution.yourActivity')