Form 1023: Notification of incorrect answer(s)
Form 1023 corrects an answer that was wrong when you gave it. What to state for each item, why every error goes in one form, and how to lodge it.
When should I use Form 1023?
As soon as you become aware that an answer you gave the Department — on an application form, a passenger card, or in response to a notice — was incorrect when you gave it. The s 105 duty applies from the moment you know.