You can edit your form anytime, even after sharing it with your users to collect responses. To make edits, open your form in Google Forms and select an existing question or answer choice to edit or add a new question, section, image, video & more. Whenever you make the edits, the changes will be saved instantly and it will reflected in the form whenever the user opens the form.
You can use Apps script or add-ons from google workspace marketplace to dynamically update google forms when a user fills the form and submits it. There are two key use cases where this is required.
Limit responses in Google Forms: You can close the google form to stop accepting responses once the max limit for the response is reached. For example, If the maximum seats for an event is 30, you can close the registration form once 30 users have registered for the event. Click here to search for add-ons that limits form responses.
Limit choices in Google Forms: You can remove, update, auto-populate answers choices for dropdown, multiple-choice or checkbox questions in your form on submit. This is useful for (inventory) use cases where you want to limit the number of times an answer choice can be selected. For example, you want to limit to the number of bookings for a time slot or allow only booking for a time slot. Click here to search for add-ons that limits answer choices.
When the edit after submit option is enabled in google forms, an edit link will be included in the confirmation message shown after submit and the response receipt email sent to the form respondents. Users can click on this edit link to make changes to the response they have submitted. Click here to learn more about how this works.
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