You can set up an installment agreement using one of two forms:
IRS Form 9465, Installment Agreement Request, which you can file with your tax return to request a streamlined installment agreement and authorize direct debit payments
.
IRS Form 433-D, Installment Agreement, which you can use to finalize an approved installment agreement and authorize direct debit payments. You can't file Form 433-D with your tax return.
If you owe less than $50,000 and can pay your tax balance within 72 months, you may be able to skip the forms and set up a streamlined installment agreement using the IRS Online Payment Agreement tool.
If you need to set up a more complicated agreement, such as an ability-to-pay installment agreement or currently not collectible status, you will have to provide the IRS with a Collection Information Statement to review your financial information.