tax.iowa.gov

USPS Postmark Changes Affect Tax Filing Timeliness

The Iowa Department of Revenue issued guidance explaining how recent USPS Domestic Mail Manual changes (effective December 24, 2025) affect the timeliness of mailed tax returns, payments, and appeals. The guidance clarifies how the updated postmark policies apply to Iowa tax filing deadlines. Taxpayers who mail filings should review the new requirements to ensure submissions are considered timely.

Iowa Tax Filing Guidance: 3.8% Flat Rate, April 30 Deadline

The Iowa Department of Revenue has issued guidance for the 2025 tax filing season, reminding taxpayers of available resources and key dates. The notice highlights the new 3.8% flat tax rate and the April 30 filing deadline, encouraging the use of online tools like The Kernel virtual assistant.

Iowa Issues New 2026 Income Tax Withholding Tables

The Iowa Department of Revenue has issued updated income tax withholding formulas and tables for 2026. These changes are necessary to account for inflation and federal tax law modifications enacted by the 'One Big Beautiful Bill Act'. Employers are advised to review and implement these new tables for the upcoming tax year.

Iowa Tax System Modernization Complete

The Iowa Department of Revenue has completed its five-year technology modernization program, integrating 22 legacy systems into a new, user-friendly revenue system. This launch includes new online services like GovConnectIowa, aimed at streamlining tax filing, licensing, and communication for Iowans and businesses.