What years are still allowed to be efiled on ProSeries
For the 1040, 2017, 2018 and 2019.
I had no idea that I could file previous years 1040, although I tried by carefully completing the info worksheet, I was never successful. Where I can find the details of that process?
You need to be in the program for the year you want to file and the process is the exact same as in the current year.