Used TurboTax Premier desktop for Mac. I underpaid my 2018 AZ state estimated tax, but TurboTax did not automatically fill in AZ Form 221; consequently I just yesterday learned that I had a penalty due. TT included Form 221 in the list of forms but did not address it in the walk-through and did not consider it an error for the form to have no boxes checked. This error cost me an additional three months of penalty.
