For some reason, the IRS has a different AGI in their database. You need to find out what number they have so you can e-file.
Start by getting a free IRS transcript for your 2019 return. (If you're filing jointly in 2020 but your spouse filed their own return in 2019, also get a transcript for your spouse).
On your transcript, look for ADJUSTED GROSS INCOME (you may need to look on page 2). This is the number in the IRS database. Make sure the AGI you enter matches this number exactly.
If you're unable to order an IRS transcript, try entering 0 as your AGI, assuming you haven't already gone that route. You can also try entering last year's signature ID (instructions below).
Failing that, you can opt to file a paper return; follow the solution steps above, except select File by mail when it appears.
Yes, you can file prior year tax returns after filing your current return.
However, you will need to use a TurboTax CD/Download product to complete you previous year return. You will print and mail because the IRS is no longer accepting prior year returns for e-file.
For more information about the product you need, follow this link: Past Years Products
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