If you are unable to pay the full amount of tax due as shown on your individual income tax return, you may request monthly installment payments. To apply for an installment agreement, complete and file your return by the due date. Place Form GA-9465 (https://etax.dor.ga.gov/inctax/2008_forms/TSD_Installment_Payment_Agreement_Request_GA9465.pdf ) on top of your return and submit it along with your return or when you receive a bill for the balance due, submit a written request for an installment payment plan to the Installment Program Section, P.O. Box 740396, Atlanta, GA 30374-0396. You may also call (404) 657-0295 to request an installment payment plan once you receive a bill. To minimize the interest and penalty charges, you are encouraged to pay as much of the tax as possible by April 15. If you would like to make additional payments before receiving a bill, send payments to: Installment Program Section, P.O. Box 740396, Atlanta, GA 30374-0396. Be sure to write the tax year and your social security number on the check. Note: Interest and late payment penalties will apply to any amount not paid by April 15, even if your request to make installment payments is granted. Before requesting an installment payment agreement, you should consider less costly alternatives.