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(925) 277-3424cynthia@cpacyndi.com2010 Crow Canyon Pl, San Ramon
Now accepting appointments for the upcoming tax season
CAW monogramCynthia A. Wilkinson, CPATax & Accounting · San Ramon
Home / Tax Calendar

Important dates for 2026

Plan ahead with my tax-season schedule. Getting your information to me early is the best way to file on time — without the scramble.

Good to know: If you have not received your completed tax returns for electronic signing by March 31, I will be extending your tax returns regardless of the date you submitted your information. Extensions are for filing, not paying — I’ll calculate your liability so you have enough paid in.
26Jan

IRS opens filing season

The IRS start date for 2025 simple individual tax return filers is January 26, 2026.

10Mar

Pass-through returns finalized

Last day I will finalize 2025 nonextended partnership (LLC) and S corporation returns to meet the March 16 filing deadline.

16Mar

Partnership & S corp deadline

Filing deadline for nonextended pass-through entity returns. Extended due date: September 15, 2026.

20Mar

Last in-person appointment

Final day for an in-person office appointment to make the April 15 filing date for nonextended returns.

24Mar

Last virtual appointment

Final day for virtual appointments for nonextended returns.

30Mar

Individual & C corp returns finalized

Last day I will finalize 2025 nonextended individual and C corporation returns and send them to you for review and signing.

1–15Apr

Extensions & estimates

I prepare and e-file 2025 federal and state extensions and prepare 2026 estimated tax calculations. No signing or action is required of you.

13Apr

Last day to transmit e-files

Last date to receive your signed e-file authorization and payment of fees to meet the April 15 filing date.

15Apr

Individual filing deadline

Federal and California individual returns and first-quarter estimated payments due.

15Jun

PTE elective tax payment

Pass-Through Elective tax (PTE) 2026 required payment due.

15Aug

Extended entity info due

Last day to provide all entity tax information to meet the September 15 extended due date.

15Sep

Extended entity returns due

Extended partnership and S corporation returns due. Also the last day to provide ALL 2025 individual information for the October 15 deadline.

15Oct

Extended individual deadline

Extended individual returns due. Information received after September 15 cannot be guaranteed for on-time filing.

Post-season break

I will be unavailable and on break April 16 through May 17, 2026. I’ll begin working on extended tax returns once I return.

2026 vacation dates

Please plan accordingly — I’ll be unavailable:

Jun 12 – 15Jul 24 – 27Sep 10 – 14

Stop dreading April 15th.

Let’s build a plan that keeps more of what you earn — and takes the stress off your plate.

Book an Appointment Call (925) 277-3424