I have been having this problem for the past 2 years 2020 and 2021. Turbotax will not update, keep getting error codes 1603 and 2502. Called Turbotax and the only solution they gave me was to uninstall and reinstall the programs. After I get these error codes or cancel the updates updates Turbotax won't open at all. There is something wrong. I don't have ANY update problems with any other program I have, only Turbotax. I have read many blog post last year about this and it seems to be a unversal problem with Turbotax. A lot of people are having the same problem. I'm running Windows 10 and have been using Turbotax for over 20 years and these past 2 years it has been nothing but problems. They need to look into this and try and solve whatever the issue is.