Option 1: Pay all or some of your Iowa income taxes online via: EasyPay Iowa.
Option 2: If you owe IA income taxes, you will either have to submit a IA tax return or extension by the tax deadline in order to avoid late filing penalties. You can only eFile and IRS tax extension, but not an Iowa extension. The tax extension will only avoid late filing penalties until the deadline.
Note: Unless you pay all your Taxes or eFile your tax return by the October deadline, the late filing penalties will start again after that deadline.
Option 3: Complete Form IA 1040V, include a Check or Money Order, and mail both to the address on Form IA 1040V. Important: Even if you filed an extension, you will still need to file your IA tax return either via eFile or by paper by the October deadline.