Go to ftb.ca and search for installment agreement, select online and follow the instructions on the Installment Agreement – Apply Online page. Only newly assessed liabilities may qualify for an online installment agreement.
If you are unable to revise an existing installment agreement online, call us at 800-829-1040 (individual) or 800-829-4933 (business).
About Form 9465, Installment Agreement Request. Internal Revenue Service.
Answer: Contact an IRS customer service representative to correct any agency errors by calling 800-829-1040 (see telephone assistance for hours of operation).