If you're an Engineer you shouldn't be afraid of a little math. I've done the TaxCut / H&R Block for many many years and it's very idiotproof. The year I got married, which should have been the most complicated, my new uncle-in-law did them as a gift to use since he's a CPA. For the $20, I did them myself again and matched to the penny.

Edit: On a whim I just checked and I have 2012 thru 2022 installed on my server still.