Select the form in the tab 'Sent' and open it by clicking on 'view'. Next to each field there is a button 'Correct data'.
You can also do a Form correction
When clicking on this button, a dialog field appears and you can select a new value and/or write a clarification in the 'comment' field.
Click on 'Save'. The data correction appears below the box. The red background indicates that the data correction was not yet sent. Click on the 'back to list' button at the top of the form to close it. If necessary, the data correction can be edited or deleted in the tab 'Queries'.