I added an automation to return a link to person for updates in case they start to fill it out and don't have all the information. I have a column in the sheet for "Hold/Submit" and use the Hold to trigger the automation to send them back a "Requests an Update". You can set it with options for different submissions, Hold, Hold 1..... and a final submit choice. Have an automation for each hold, then they can alternate and send it back to themselves all they want.