By Jason Watson (Google+)
There are a handful of ways to pay your taxes, not only for back taxes but for any tax due:
Check or Money Order: This is obvious of course, and the can be mailed or delivered in person. Make checks or money orders payable to United States Treasury, and write your social security number and tax year in the memo area for proper handling. The IRS also suggests writing your phone number on your check or money order. Also, most banks will tell you that using online bill pay is not recommended for paying taxes.
EFTPS: The Electronic Federal Tax Payment System is a free service from the US Department of the Treasury. All federal taxes can be paid using EFTPS. You can make payments via their web site, a voice response system, or special channels designed for tax professionals, payroll services, and financial institutions. Quick, secure, and accurate, EFTPS is available by phone or online 24 hours a day, 7 days a week. You can schedule a business payment up to 120 days in advance or an individual payment up to 365 days in advance.
Please visit the EFTPS website at www.eftps.gov to enroll and make your tax payment. Some states also have an online payment option. Please contact us for more details.
Credit Card or Debit Card Payments: There is a third party vendor that several states and other taxing authorities endorse for various types of tax payments including Federal taxes. They are called Official Payments (sounds legit) and their web site is www.officialpayments.com. They charge about 2-3% of the payment amount for this service.