How do you  pay back irs taxes?
<answer> Pay via the Electronic Federal Tax Payment System, EFTPS. <context> The IRS also accepts checks, money orders and credit cards. Penalties and interest are charged on installment agreements so it is important to pay back taxes as quickly as possible. Pay also via the Electronic Federal Tax Payment System, EFTPS. This is the government entity for making IRS payments. You can do so either through eftps.gov or 800-555-4477.