The basics went great, it is a relatively simple return. There were 2 entries that continued to error, even though I verified the data and the necessary forms. I did not understand what was needed as it all looked correct based on the definitions. So I am printing and mailing the returns instead of e-filing adding cost.
Very easy to use. Did not need Tax support help. There is one improvement I would make. I tried file on 15 Jan which now I know is too early. I had to repeat a number of steps on 31 Jan to file. Before I started those steps like completing form 8453, if it had told me it was too early to file, I would not have wasted time. I did not know until I hit "Transmit Returns Now". Otherwise ...EXCELLENT!!!!!!!!!!!!!!!!!!!!!
Clunky, severe lack of helpful explanations and links like in your browser-based tools. Also, key forms that I had to print, sign, and scan to include with filing had huge watermarks all over them that made them impossible to use.