Check out this free in-person preparation and filing service for taxpayers from the IRS (to qualify you must have made less than $40,000 the previous tax year.)

From the IRS site (linked above):
The VITA Program offers free tax help to low- to moderate-income (generally, $40,000 and below) people who cannot prepare their own tax returns. Certified volunteers sponsored by various organizations receive training to help prepare basic tax returns in communities across the country. VITA sites are generally located at community and neighborhood centers, libraries, schools, shopping malls, and other convenient locations. Most locations also offer free electronic filing. To locate the nearest VITA site, call 1-800-829-1040.

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