I’ve had a great experience using this system. It’s user-friendly, easy to learn, and works exactly as expected. The features are organized in a way that makes completing tasks quick and efficient. Overall, it's a great tool that I would gladly recommend to others.
Spent over 40 hours struggling through a Federal plus 2 state returns. Although the Federal return process is somewhat robust with good explanations, the state returns are woefully inadequate. Two examples: unemployment income is not taxed in my state, and although it was entered as such in the federal portion, it was not captured and subtracted in the state return (I had to find that out from the state dept of revenue). For the other state, the requirements are that the Federal AMT form (6251) be attached in some cases even if federal AMT is not owed. But TurboTax will not generate the form if it's not required on the federal return (that was a 2 hour phone call with customer support trying to troubleshoot), so I have to pull the form myself, fill it out by hand, and file by mail (extra printing and postage expense, plus time). From research in the TurboTax Community Forums, this latter flaw has been reported since at least 2019 but TurboTax has never fixed it.
Last issue is navigability and transparency within the software, where TT puts a black box between the user interface and the final forms (which it won't let you see until after you've paid -- for a return you will have to pay even more to mail, because TT won't produce an e-fileable one). So when fixing errors in the final review a message will appear saying "Box 3 in Form D cannot be blank", without any guidance or link back into the interface to understand what information the form needs. Or "we calculated investment income of $XXX, what portion of this should be allocated to this state return?" without any link or reference as to how "we" came up with that particular calculation.
Big lesson learned this year --- while I may in future continue using TurboTax for federal filing, it's not worth the aggravation, lack of confidence, wasted time, and expense for doing state returns.