Since it is tax season I thought I would do a review of the best site that I've used. It is taxactonline.com. I have used this site for 3 years now and I can't say enough good things about it.
It is super easy to use, anyone can use it. All you have to do is type in exactly what it asks for and your set. It even has help guides on what you can and cannot do.
You can easily file both your federal and state return electonically, have it automatically deposited into your checkin or saving accounts, and not have to submit anything by mail. The cost is only $16.95 to electronically file both of your returns. If you only want to e-file your federal return, it's FREE!
A really cool feature of this is if you remember the username and password that you used the year before, it will import all of your information from last year into the new one. Saves some time in keying in the information that remains the same year to year.
I highly recommend this site to everyone.