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 sent Letter 2840C to notify you that an installment agreement has been set up, and show you the payment amount, due date, and payment address. The IRS Online Payment Agreement system lets you apply and receive approval for a payment plan to pay off your balance over time. For installment agreements for 48 months or less, the taxpayer must sign and return the installment agreement (Form 990). To ask for an installment agreement, complete this form. Attach it to the front of your return when you file. You can set up an streamline payment plan with both the IRS and State of Michigan. For questions call us at 517-714-4965. This file contains the Michigan Department of Treasury's Installment Agreement form for individuals and businesses seeking to establish a payment plan.