KEY POINTS
  • If your 2020 tax return is still pending, you'll need to enter $0 for your 2020 adjusted gross income when electronically filing.
  • This may include filers who received the CP80 "missing return" notice for 2020.
  • And if you used the nonfiler tool in 2021 to collect the advance child tax credit payments or your stimulus check, you must put in $1 for last year's AGI.

If you're one of the millions of Americans still waiting on your 2020 tax return, you'll need to take a special step to avoid a rejection for this year's electronic filing, according to the IRS.

When filing digitally, you validate your return with the previous year's adjusted gross income. Typically, your tax filing software has these details if you're a returning customer. Otherwise, you can manually enter the numbers.