IRS Tax Forms and Instructions - You can download almost any IRS form with instructions from this site.

Tax Regulations - List of tax regulations issued since August 1, 1995, with references to plain language summaries where available.

U.S. Tax Code - The United States Code contains the text of current public laws enacted by Congress. The U.S. Code does not include regulations issued by executive branch agencies, decisions of the federal courts, or treaties.

IRS Site Map - Looking for an IRS site not listed here? Slice through the confusion and go directly to their site map.

Where To File Federal Tax Returns - The filing addresses have changed. This IRS guide lists the new locations for your area.

IRS Withholding Calculator - A handy tool to determine how much you should withhold from your paycheck.

Smbiz.com - An excellent site with a tremendous amount of useful tax information: