I am having the same problem with Part IV of form 2210 as Thomas S. Form 2210 has not been updated to recognize that only columns (a), (c) and (d) are in use for 2020 because of the deadline changes made for estimated taxes in 2020 due to COVID-19. In my case, line 26 of column (a) should be carried over to line 20 column (c) not line 20 of column (b). We waited weeks and weeks for this form to be available and now we cannot file because the form has not being updated correctly. Step up your game TurboTax!
