Corporation Income Tax Forms

Important: See Tax Year 2013 Income Tax Changes for Iowa Taxpayers

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Forms - PDFs


IA 8453-C Corporation Income Tax Declaration for an E-File Return 42-009

IA 1120 return only 42-001

IA 1120 instructions only 42-002

IA 8453-S S Corp Income Tax Declaration for an E-File Return 42-013

IA 1120S S Corp return only 42-004

IA 1120S instructions only 42-005

Investment Partnerships & Investment S-Corporations

IA 1120X Amended Corporation Return 42-024 (cannot be used to carryback net operating losses)

Tax Payment Voucher 42-019

Schedules F and G Net Operating and Alternative Minimum Tax Loss Carryovers 42-020

Schedule H Computation of Federal Tax Refund/Deduction 42-021

Schedules I and J IA 851 Affiliation/Consolidated Business Activity Ratio 42-022

IA 128 Research Activities Credit 41-128

IA 128S Alternate Simplified Research Activities Credit 41-124

IA 133 New Jobs Credit Worksheet 41-133

IA 135 E85 Gasoline Promotion Tax Credit 41-150

IA 137 Ethanol Promotion Tax Credit 41-151

IA 138 E15 Plus Gasoline Promotion Tax Credit 41-152

IA 148 Tax Credits Schedule

IA 1139-CAP Application for Refund Due to the Carryback of Capital Losses 42-028

IA 3468 Investment Tax Credit Worksheet 42-034

IA 4136 Computation of Motor Fuel Tax Credit 41-005

IA 4562A Iowa Depreciation Adjustment Schedule 41-105

IA 4562B Iowa Depreciation Accumulated Adjustment Schedule 41-106

IA 8864 Biodiesel Blended Fuel Tax Credit 41-149

Iowa Estimated Corporation Income Tax Forms


IA 1120ES Estimated Tax Vouchers
45-004

IA 1120ES instructions only for 2014 45-010

IA 1120ES instructions only for 2013 45-010

IA 2220 Underpayment of Estimated Tax 45-006