I put the wrong AGI in my extension. Rejection email came through just after midnight after deadline, and it says...
Your Federal Personal Extension has been rejected
Dear TurboTax customer:
This happens from time to time, but we’ll help you fix it.
What happened?
'PrimaryPriorYearPIN' or 'PrimaryElectronicFilingPIN' or 'PrimaryPriorYearAGIAmt' in the Return Header must match the e-File database.
What does this mean?
Make sure you submit a new extension application before the filing deadline.
