Pay the IRS online through its website, via mail and at a local IRS office, according to the IRS. Payments through the IRS website can be direct pay, in which the IRS deducts money from your bank account or via credit or debit card.
You can also pay through same-day wire; fees likely apply, according to the IRS. To pay by check, cashier's check or money order, make the document payable to U.S. Treasury. Include your contact information, Social Security number and other relevant data. Send the payment to the address on the tax notice, or follow instructions to find the correct address. If you want to pay in cash, use the Office Locator tool on the IRS website to find the closest taxpayer assistance center that accepts cash.
To use IRS Direct Pay, choose from a list which form you are using; examples include 1040 and 1040ES, says the IRS. Pick the reason for payment, such as installation agreement or tax return. Choose the tax year for payment, and enter information to verify your identity. Enter information about the bank account from which the IRS deducts the payment. To pay by credit or debit card, choose a payment processor; each processor charges a fee. The IRS also allows taxpayers to set up online payment agreements and other methods to pay tax due.