preenche-notas.js

const NEW_VALUE = 1
const forms = document.querySelectorAll('form')

const save = ({ input, submit }) => new Promise(async(resolve, reject) => {
  try {
    input.value = NEW_VALUE
    await submit.click()
    resolve()
  } catch (err) {
    reject(err)
  }
})

const promises = [...forms].map(form => save({
  input: form.querySelector('input[type="number"]'),
  submit: form.querySelector('input[type="submit"]'),
}))

Promise.all(promises)
  .then(() => alert('Todas concluídos'))
  .catch(err => {
    alert('Error, verificar o console do navegador')
    console.log(err)
  })