How to finish a return you started online
https://ttlc.intuit.com/community/prior-year-return/help/how-do-i-finish-a-prior-year-return-that-i-...
You will first need to download the tax data file from Online. It will end in .tax2018, .tax2019, .tax2020 etc. You can download the tax file for free. Then you need to install the Desktop program.
After you get the program installed the first thing to do before you open your tax return .tax file is to update the program and install any state programs you had. Then open your file. So you first might need to start a fake return to be able to download the state program (go to FILE - NEW).
You get one free state program in the Desktop program. To do another state you will have to buy the new state program.
