I just finished doing my taxes this evening. For the last several years i've either used TurboTax (retail software for windows) or TurboTax For The Web, which is their online version of the same program. I've been using linux for about 4 years now and i'm quite happy with it. Until TurboTax came out with a web-interface, i still had to do my taxes using Windows (or a pencil, ewww...). But last year their system blocked my web browser (firefox) even though i had been using the same service with Mozilla for the lasttwo years! So in protest i fired off a nasty letter and told them they lost a customer.

I then found a list of sites through IRS.gov that let you file FREE if you meet certain income requirement. I tried one called CompleteTax and was basically happy with their web interface but it was still a bit linux unfriendly. In fact, i had no way to view my return since their idiot Windows-centric system tries to scan your computer for Adobe Acrobat Reader (the scan only works on windows and, of course, fails on linux systems even if they have acrobat reader installed, so you don't get to view your return at all). So i fired off a bunch more complaints and jumped through hoops to get my return printed (ultimately, on another computer running Windows since i had no choice). This year i went back to see if the service had improved. And thankfully they now have a link that says "click here to download your return if your it does not show in your browser" which allows you to simply download the stinking PDF file and open it on your choice of PDF reader. I also found a "designed with Firefox in mind" and the blue and orange Firefox logo at the bottom of their front page.

LONG STORY SHORT:

I got my taxes done online using Firefox on Linux without a hitch this year! I even got my federal return done for free (i make less than $29k a year, pity me). For the record, my return is fairly simple. Just a W-2 and some interest and dividends. No marriage, kids, house or anything more complicated, so YMMV.

I hope fellow linux users benefit from my experience. Pass it on:

http://www.completetax.com/

I have filed for teh past 2 years at http://www.esmarttax.com (IRS reccomended) without a hitch using Linux and Firefox

This is my first year filing with Linux. Turbotax online worked like a champ, even though when you log in it opens a new tab that says you might have problems. The only problem that I experienced was that kpdf and kword wouldn't properly display the PDF tax return, so I had to install the Adobe Reader. It's the only thing that will display the silly thing, and konqueror can't even recognize it as a PDF.

Based on recommendations from the Ubuntu Forums, I filed my income taxes at TaxAct.com using Ubuntu and Firefox. It was great.

I too used TaxAct. It's great that some companies are slooowly beginning to realize that not everyone uses MS.

I recently did my taxes on H&R Block using Firefox on Fedora Core 4 with no problem (you may have to disable pop-up blocking). Got my refund 5 days later.

This was my experience as well. Last year I also used TurboTax Online w/ FireFox, but IIRC I had to use the "User Agent Switcher" to fool it into thinking I was using IE6... This year, though, no problems. I'd recommend them (though I've been using TurboTax online since they first started up, well before I made the switch to Linux..)