Idaho, as well as the IRS encourages taxpayers to participate in file tax online programs. It cuts costs for the agencies, but more importantly it saves the taxpayer the headache of dealing with clumsy instruction booklets, going through snail-mail and worrying about your return getting lost. This state requires e-filers to use the same service for both federal and state returns, which is fastest and most convenient. Forget that 5-minutes-to midnight drive to the post office.

Start here.