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.
WHY THE IRS REJECTS INSTALLMENT AGREEMENT REQUESTS. The IRS typically rejects an installment agreement request for one of three reasons. If the IRS determines that your living expenses do not fall under the category of “necessary,” your agreement will more than likely be rejected.
Or: For individual tax returns, call 1-800-829-1040, 7 AM - 7 PM Monday through Friday local time. The wait time to speak with a representative may be long. This option works best for less complex questions.