Use Form 9465 to request a monthly installment plan if you cannot pay the full amount you owe shown on your tax return (or on a notice we sent you). Use Form 9465 to request a monthly installment agreement (payment plan) if you can't pay the full amount you owe shown on your tax return.The IRS Online Payment Agreement system lets you apply and receive approval for a payment plan to pay off your balance over time. Our comprehensive guide explains the purpose of Form 9465, how to fill it out correctly, and the steps to request an installment agreement. You may request a payment plan (including an installment agreement) using the OPA application. If you can't pay the full amount you owe, you can ask to make monthly installment payments. Why did I get less money in a federal payment (for example, my tax refund) than I expected? If you set this up and the payments are auto deducted, the IRS will withdraw any tax liens after 3 months of payments on request.