Believe it or not, there’s a boatload of tax resources available for self-employed folks at the IRS website.
If you are reluctant to spend a dime on tax advice, this is a good place to start looking for help:
Self-Employed Individuals Tax Center
http://www.irs.gov/businesses/small/article/0,,id=115045,00.html
Small Business & Self-Employed Tax Center
http://www.irs.gov/businesses/small/index.html
Small Business Forms & Publications
http://www.irs.gov/businesses/small/article/0,,id=99200,00.html
Small Business Products (these are free too!)
http://www.irs.gov/businesses/small/article/0,,id=101169,00.html
S Corporations
http://www.irs.gov/businesses/small/article/0,,id=98263,00.html
Many Happy Returns!