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IA 1120 Estimated Tax Instructions 45-010
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IA1120ESInstructions(45010).pdf
Tax Type
Corporation Income Tax
S Corporation Income Tax
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I Am...
An Individual Taxpayer
A Business
A Tax Professional
A Local Government
I Need To...
File My Taxes
Track My Return
Make a Payment
Register for a Permit
Change or Cancel a Permit
Learn About Property Tax
Learn About Sales & Use Tax
File a W-2 or 1099
Request Tax Guidance
Tax Forms
Tax Forms Index
IA 1040 Instructions
Resources
Online Services
Law & Policy Information
Reports & Resources
Tax Credits & Exemptions
Education
Tax Guidance
Tax Research Library
Adopted and Filed Rules
Need Help?
Common Questions
Education
GovConnectIowa Help
Report Fraud & Identity Theft
About
About the Department
Newsroom
Careers