When do I fill out and submit my form to CBP on the Mobile Passport App?

In general, wait to submit your passport(s) and answers to CBP’s questions upon arrival at your port of entry, after you have landed or docked. For optimal connectivity, we advise travelers to wait until they have reached the Federal Inspection Services (FIS) area to make their submission. Then, within seconds, travelers should receive an encrypted QR code receipt(s).