By Jason Watson (Google+)
There are several options but predominantly there are two-
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 to enroll and make your tax payment. Some states also have an online payment option. Please contact us for more details.
Official Payments: There is another third party vendor that several states endorse for tax payments. 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 (no free lunch on those travel miles or cashback, sorry).