The personal tax portion of Premium & Business worked OK. If you have an S-corp that requires 1120S, it's supposedly supported. However, the interview process is VERY weak, and if you simply follow the interview, you will miss out on the 20% Qualified Business Income deduction! I caught this at the last minute and bought Turbo Tax, which brought my tax liability down by about $11k!
It took a while to become familiar with the software but I once did, the software is user friendly and does all of the work for the return based on the info entered into the worksheets. I feel confident nothing was missed.
Filling out the federal return was fairly straightforward, but the state returns (MA and NY) were terrible. Very little instruction, and some of the instructions in the software read differently than the actual forms. I also filled out payment information for electronic funds payment (NY) but that didn't populated the electronic filing and so I ended up with a bill with interest.
For me, this software is what I need to get things done for my personal and business taxes. It's not always a quick process, however, as you improve your understanding of things (your records, receipts, etc) -- it becomes much more intuitive. It may not be a great fit for every self-employed business owner or DIY tax payer, but the tools are solid. Printing what you need if you are mailing your forms is not always intuitive & I like the option of filing electronically.
Helps only with simple math, simple check boxes, and carrying values between forms. Interview help stops abruptly in areas that are only slightly more complex than typical. You then get dumped to the raw IRS forms and IRS Instructions to bushwhack through those all on your own, with no assistance whatsoever. "Go to the IRS form, fill out following IRS instructions, and then return." No value add whatsoever in all those areas.