It's hard to trouble shoot the online version because you can't print the forms or worksheets until after you pay the fee, or after you file if you are using the free version, and free version users aren't entitled to phone support. You could upgrade to the Plus version and then try and call support, they can do a screen share and look at the details of your file to see where the error is. Maybe you entered box 3 of your W-2 incorrectly. If self-employed, you might be showing a loss due to errors in the data entry. We can't rule out a bug, either, although your problem has not been commonly reported recently.
