I have created two files in FreeTaxUSA. They both have the same main taxpayer Soc Security numbers for the taxpayer and spouse. One is for the 2018 tax year and one is for the 2023 tax year and was created to file an extension for 2023 and later to be used to file the completed 2023 tax return. To create the 2018 tax return, I imported my 2017 Turbo Tax pdf. It worked fine and imported all of my data to get me ready to complete 2018. I mainly needed Depreciable Assets for my Rental properties... to get 2018 started. Otherwise, I could have started from scratch and entered everything manually. I was able to complete 2018 but have not filed it. I actually have to do paper returns and plan to send the IRS all years in the same envelop with each year inside its own envelope .Then I needed to do 2023 Tax return and I opened up a new file (which I realize is not what you should do) to input my 2023 tax data. I found out that FreeTaxUSA can't differentiate between files that have the same social security number. I knew that because I was unable to control which file (year) I would login into. And today I got into the file for 2018. On April 15th I did my 2023 return, completed it, but there were a couple of questions I couldn't answer so I did an extension. So now, I am wanting to work on 2018 and all returns up to 2023. I had a health condition and did not file from 2018 to 2022. I have talked to the IRS and I am filing all of these returns now. I owe no tax in any of the years. I have some refunds coming for most years. I have lost my refunds for 2020, 2019, and 2018 because of the three year statute the IRS has. I want to continue to complete each year's return in the same FreeTaxUSA file. How can I do that? Can the data be merged into one file? And how do I control which file I log into when I am logging in FreeTaxUSA. Will it be 2018 or 2023? Today as I said, I was logged into 2018... why? I do not know.... Because a few days ago, I was in the tax year 2023 file and was working and created that year. After I created 2023, when I tried to log back into 2023 and/or the 2018 file, FreeTaxUSA gave me error messages and wouldn't let me in either file. Now, I come back tonight and it lets me into the 2018 file???? And now I need to add 2019, 2020, 2021, 2022 and then finish 2023 which is in the other FREETAXUSA file... But I have two files out there and do not understand how to combine them and or how to differentiate them when I log in so that I can log in to the correct file??? Any help appreciated greatly...