Sometimes it may be necessary to prefill a question with the value of a Logic. An example scenario may be a charity donation amount. The logic could calculate a suggested amount to donate, and this could be prefilled into a text field for the customer to edit as they wish.
To inject a logic on your form:
In your form, click Advanced > Prefills in the top navigation bar (under the the form title).
Click Add Prefill. The create interface will open.
Select the question to be prefilled.
Select the name of the logic as the value of the prefill.
The prefill will be created and added to the list.