Tiffany.. In 2019 I purchased Turbotax Deluxe for 2019. Installed from CD. Entered license code. No problem. Finished my 2019 tax return, filed electronically, no problem. For 2020, same routine. Filed electronically. Now, when I try to look back at my 2019 return, when Turbotax 2019 launches, it asks for the license code for 2019. I get the 2019 CD, enter the license code and get the error code 603 "all activation's have been used." I followed all instructions for all recommended resolutions and no success. I'm afraid that if I need to amend my 2019 return, I won't be able to.
