New AGI requirement for e-file

All taxpayers should keep a copy of their tax return. Beginning in 2017, taxpayers using a tax filing software product for the first time may need their Adjusted Gross Income (AGI) amount from their prior-year tax return to verify their identity. Taxpayers can learn more about how to verify their identity and electronically sign tax returns at Validating Your Electronically Filed Tax Return.

https://ttlc.intuit.com/replies/3301618