It's 2020. I need to go back and file my 2017 state income tax. I filed my 2017 federal taxes but not my state. How would I now go about going back and adding state?

[jamieson5]

I live in Missouri and am unsure if I am able to go back using TurboTax to add my 2017 state taxes.

[DoninGA]

See this TurboTax support FAQ for completing a prior year tax return originally started with the online editions - https://ttlc.intuit.com/community/prior-year-return/help/how-do-i-finish-a-prior-year-return-that-i-...

[xmasbaby0]

@jamieson5 The only way to add the state return using TurboTax software will be by using downloaded desktop software that will cost you about $80.  If your return is simple, just print out your 2017 federal return and prepare the state return on the paper forms from your state by hand and mail it in.