Can you add to an IRS installment agreement? Yes, but you must act quickly after you expect to owe the IRS additional taxes for the current year. Once the IRS has determined that you owe an additional balance it will consider your existing installment agreement to be in default.
If you don't qualify for an IA through OPA, you may also request an IA by submitting Form 9465, Installment Agreement Request, with the IRS. When you request an IA using the form, generally, you'll receive a response from the IRS within 30 days notifying you of whether the IA request was approved or rejected.
If you don't qualify for an IA through OPA, you may also request an IA by submitting Form 9465, Installment Agreement Request, with the IRS.
You can still request an installment agreement by submitting Form 9465, Installment Agreement Request, directly to the IRS. However, the timeline for approval through this method is slightly longer. Generally, you can expect to receive a response from the IRS within 30 days of submitting the form.