2019 was the first year that license codes were used for the download software.  Prior to then, there were no license codes.  Sorry.....you cannot newly install/download software older than 2021 now.   You will not be able to "re-install" that old software now.    TurboTax no longer supports or updates the older software, nor does TT provide the state downloads for years earlier than 2021.
					
				
			
			
				
	**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**