I know others have had this problem and I've read their posts.
Prior to year-end, as part of my tax planning, I used the 2021 version of TurboTax (Premium / download) to enter my anticipated 2022 numbers into a file that I saved as Test.tax2021. Now that I'm preparing my actual 2022 return, I'm getting a different result and want to compare my actual with my test version. But when I try to open my test version I get the above referenced Error 190. There are no state returns on this return. How can I get past this error?