For those of you that asked how I got around this bug in TurboTax Deluxe on Windows 10... When I did the Review under the Review tab (after having already reviewed, individually, both the Federal and State returns), I noticed that my Federal refund had mysteriously decreased. I opened the Forms View and saw that the 1040/1040SR Wks form was flagged as not complete and had line 12b flagged with an error (has an unacceptable value... the $600 had been decreased to $300... which was deemed to be unacceptable in that form). I changed the $300 on line 12b in the worksheet back to $600 and the form deemed that to "be acceptable." After that, I tried the review tab again... with the same results. So, I again changed the $300 back to $600 and then skipped over the Review tab (note that the individual Federal & State reviews still deemed the returns to be error free) and went straight to the File tab in the Step-by-Step view.
Note that in my case the deductions would have carried over to the state return, since I didn't delete them... but it was immaterial as I am retired and PA doesn't tax retirement income anyway.
I believe that some of the "confusion" on the TurboTax developers part stems from inconsistent information being supplied by the IRS (and most likely, different developers working on the different parts of TurboTax). The latest version of Publication 526 (Charitable Deductions), which is labeled for the tax year 2020, indicates that the maximum amount of the "Cash contributions for individuals who do not itemize deductions" for "married filing jointly" is $300. However, the IRS Topic No. 506 clearly states that the amount is $600 for married individuals filing joint returns. See https://www.irs.gov/taxtopics/tc506
I hope this helps those of you that need to leave your deductions in TurboTax because they are necessary for your state returns. Good luck!
And, my final complaint... it's simply unconscionable that TurboTax doesn't provide a "bug reporting" method. And... it's also a very bad business practice that will probably result in a loss of customers due to persistent unaddressed bugs in their production.
