Monday, January 26, 2026
The IRS will start accepting tax returns.
S Corporations and Partnerships (multi-member LLC’s)
Monday, March 2, 2026
All tax documentation must be received for us to guarantee an on-time filing.
Tuesday, March 9, 2026
eFile or Extension authorizations must be received. Appointments made after March 9, 2026, are
not guaranteed to have taxes filed by the deadline of March 16, 2026.
Monday, March 16, 2026
The filing deadline for Partnerships/Multi-Member LLC’s (Form 1065) and S Corporations (Form 1120S). Tax payments are also due regardless of an extension (*see below). If your business uses a fiscal year, you need to file your tax return by the 15th day of the third month following the close of your tax year.
Individual, Single Member LLC’s, Sole Proprietor & C-Corp Tax Returns
Friday, April 3, 2026
All tax documentation must be received for us to guarantee an on-time filing.
Thursday, April 9, 2026
eFile or Extension authorizations must be received. Appointments made after April 9, 2026, are not guaranteed to have taxes filed by the deadline of April 15, 2026.
Wednesday, April 15, 2026
The filing deadline for Individuals, single member LLC’s, sole proprietorships and C Corporations. (C-Corps – If the fiscal year is different than the calendar year, C-corps must file by the 15th of the fourth month following the end of their fiscal year.) Tax payments are also due regardless of an extension (*see below).
Extensions
If you wish to extend your tax returns, we must receive written approval, a signed Extension Acknowledgement Agreement & payment from you to extend your tax returns. We cannot legally file an extension without permission. If we do not hear from you, an extension will not be filed. You may schedule an extension on our website Schedule an extension
Failure to file is a huge penalty (5% per month based on tax due). An extension to file is NOT an extension to pay. Taxes are due March 16, 2026, for S-Corps & Partnerships. Taxes are due April 15, 2026, for individuals, single member LLC’s, Sole Proprietors & C-Corps. Failure to pay is a smaller penalty (0.5% per month based on tax due). If you file an extension for your S-Corp or Partnership your taxes will be due Tuesday, September 15, 2026. If you file an extension for C-Corp, individual & Single Member LLC’s, your tax return will be due Thursday, October 15, 2026.
Process 1099’s
Tuesday, January 20, 2026
All documentation must be received for us to guarantee an on-time filing.
Monday, February 2, 2025
Due date for employers to send W-2 & 1099 forms
Additional deadline dates
Wednesday, April 1, 2026
Required minimum distribution from your retirement account due if you turned 73 in 2025.
Wednesday, April 15, 2026
Last day to make a contribution to a Traditional or Roth IRA, Health Savings Account (HSA), SEP-IRA or 401(k)
Income Tax Estimate Tax Payments
Most businesses & self-employed individuals must submit estimated tax payments each quarter. Filing dates depend on whether you operate a sole proprietorship, partnership, S Corporation or C Corporation. Please use the following links for further instructions and deadline dates.
- IRS https://www.irs.gov/pub/irs-pdf/p509.pdf
- All States Tax Authority https://www.taxadmin.org/state-tax-agencies
- California Personal https://www.ftb.ca.gov/file/when-to-file/due-dates-personal.html
- California Business https://www.ftb.ca.gov/file/when-to-file/due-dates-business.html
- California Sales & Use Tax Returns https://www.cdtfa.ca.gov/taxes-and-fees/sales-use-tax-returns-filing-dates.htm