The IRS Online Payment Agreement system lets you apply and receive approval for a payment plan to pay off your balance over time. 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).In this video we will show you how to request a payment plan. 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. 433D is a one page form the IRS uses to collect all of the information they need to set up a new Direct Debit Installment Agreement, or alter an existing one. Our comprehensive guide explains the purpose of Form 9465, how to fill it out correctly, and the steps to request an installment agreement. If you apply for a payment plan (installment agreement), it may take up to 90 days to process your request. You may request a payment plan (including an installment agreement) using the OPA application.