I have been using TurboTax Business for 14 years and got into this loop while trying to do PTE for 2021 (VA)- I spoke to Tax Specialist @Turbotax and he could not figure this out. I am glad came across original post in this thread - deleting 502A and trying again worked.
Too bad same issue repeats this year as well and TurboTax is not doing anything to fix it.
