I kept getting an error when I tried to send my file to the IRS. The product code kept giving me an error, and I discovered one letter was wrong, and had to be changed for the software to work.
Sometime ago I did a phone installation for a small office and I was gifted a red CD to do my taxes on. It was basically the company's Beta version. I still have it even though CDs are no longer used. I've been using Taxcut since about 1994. I've never had a problem and have always relied on them to keep up with all the latest tax laws.
HR Block moved data from last year’s tax return seamlessly. However, I had problems resolving two conflicting state returns that the software was incapable of resolving. I had to send one state return in by mail along with detailed pater copies of our Federal and other state return. Annoying!
Program doesn’t handle quarterly payments correctly. You have to enter dates that it expects versus the IRS dates that are allowed. The program insisted on a Jan 15 date to avoid late penalties where as the actual last date is Jan 17. It did this for federal as well as state. This rudimentary error makes me wonder about other errors that weren’t obvious.