April 2026 tax and compliance deadlines

You’ve almost reached the finish line, so whether you have most of your clients’ filings nearly complete, working extra hours to get them all done, or plan on putting clients on extension, one thing remains the same: April’s tax and compliance deadlines. Be sure to share this list with your clients.

In April, it is recommended that you:

• Finalize or extend individual and C corporation returns: Ensure filings are submitted by April 15 to avoid penalties.
• Confirm IRA and HSA contributions: Verify all 2025 contributions are properly documented and submitted.
• Submit Form 941 for Q1 payroll: File on time and review wage compliance for accuracy.
• Record estimated tax payments: Confirm all payments are received and accurately reflected in client records.
• Conduct post-tax season review: Evaluate workflow efficiency and client service outcomes to prepare for improvements in the next cycle.

Key Compliance Dates

Friday, April 10: Employees who received $20 or more in tips during March must report them to their employer (Form 4070, Employee’s Report of Tips to Employer).

Wednesday, April 15:

• Deadline to file individual income tax returns (Form 1040) or request an automatic six-month extension (Form 4868, Application for Automatic Extension of Time to File U.S. Individual Tax Return).
• Deadline to file C corporation income tax returns (Form 1120) or request an extension (Form 7004, Application for Automatic Extension of Time To File Certain Business Income Tax, Information, and Other Returns).
• First installment of 2026 estimated tax payments due (Form 1040-ES).
• Deadline to make IRA and HSA contributions for 2025.
• Employers applying the monthly deposit rule must deposit Social Security, Medicare, and withheld income tax on payments made in March.

 Friday, April 24: Deposit federal excise taxes for communications and air transportation for the first quarter of 2026.

Wednesday, April 29: Deposit federal excise taxes for the second half of April (Form 720, Quarterly Federal Excise Tax Return).

Thursday, April 30: File Form 941 for Q1, Form 720, and Form 730, Monthly Tax Return for Wagers.

Intuit® Accountant Resources

• Key Tax Facts for 2025
• The April 2026 calendar with filing deadlines and reminders for you and your clients.
• Tax update for TY26: Navigating the OB3 Act and more
• One Big Beautiful Bill summary and tax changes
• Navigating the tax landscape
• IRS annual inflation adjustments for tax years 2025 and 2026