When I started the desktop version, it offered to switch to the on-line version and e-file federal and state for $0. I ran into two problems - the online version does not have anywhere to enter any estimated taxes paid during the year, so it came up with me owing a great deal more than it should. Then when I got to the end, it wanted to charge me $39 for filing the state return. I wasted a good half day going through the process only to have to go back to the desktop version and start over. Be aware of this if you have paid estimates during the year.