Gillock CPA Resource Center
Tax Resources
Important dates, trusted links, and practical guidance for business owners.
Plan ahead
Upcoming Tax Deadlines
General federal dates. Your filing date may differ.
Estimated Tax Payment
Fourth-quarter individual estimated payment generally due.
Business Return Deadline
Partnership and S corporation returns generally due.
Individual Return Deadline
Individual and C corporation returns generally due.
Dates can shift for weekends, holidays, extensions, and state requirements. Confirm your specific deadline with your tax professional.
View the complete planning calendar
| Deadline | Common filing or payment |
|---|---|
| January 15 | Fourth-quarter individual estimated tax payment |
| January 31 | Forms W-2 and most Forms 1099 furnished and filed |
| March 15 | Partnership and S corporation returns |
| April 15 | Individual and C corporation returns; first-quarter estimates |
| June 15 | Second-quarter individual estimated tax payment |
| September 15 | Third-quarter estimates and extended pass-through returns |
| October 15 | Extended individual and C corporation returns |
Trusted sources
Helpful Tax Links
Federal Tax Links
Forms, payments, refunds, and other official IRS resources.
Oregon, California & Washington
Official state filing, payment, and business tax information.
Record Retention Guide
A practical starting point for keeping key financial records organized.
- Tax returnsPermanent
- Supporting tax records7 years
- Payroll tax recordsAt least 4 years
- Formation & ownershipPermanent
A useful starting point
Guidance tailored to your business
Online resources are helpful, but the right tax strategy depends on your entity, industry, goals, and filing history. Gillock CPA provides year-round planning and preparation for businesses in Oregon, California, Washington, and nationwide.
Please note: This page provides general information and is not tax, legal, or accounting advice. Deadlines and requirements may change. Consult a qualified professional about your specific circumstances.