Personal and business Tax
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Strategic Tax Advice for Complex Situations

Knowing which taxes to file and when they are due is essential for avoiding penalties and interest. For individuals, businesses, and nonprofit organizations in Ashburn and across Northern Virginia, the 2026 tax filing season includes several important deadlines.

Individual Taxes to File (Form 1040)

For most individual taxpayers, the deadline to file a 2025 federal tax return is April 15, 2026. Virginia’s individual income tax deadline is May 1, 2026—a unique two-week buffer after the federal deadline. Washington DC follows the federal April 15 deadline.

Extension to File – You can request a six-month extension for your federal return by filing Form 4868, moving your filing deadline to October 15, 2026. However, an extension to file is not an extension to pay. Any taxes owed must be paid by April 15, 2026, regardless of whether you request a filing extension.

Estimated Tax Payments – If you are self-employed, receive significant investment income, or have taxes not fully withheld from your paycheck, you likely need to make quarterly estimated tax payments. For 2026, estimated payments are generally due on April 15, June 15, September 15, and January 15 of the following year.

Business Taxes to File

Partnerships (Form 1065) – Due by March 16, 2026, with a six-month extension to September 15, 2026. Partnerships are pass-through entities; the partnership itself does not pay income tax, but must file an information return.

S-Corporations (Form 1120-S) – Due by March 16, 2026, with extension to September 15, 2026. Like partnerships, S-corps are pass-through entities.

C-Corporations (Form 1120) – Due by April 15, 2026, with extension to October 15, 2026. C-corps pay tax at the corporate level.

Payroll Taxes (Form 941) – Quarterly filings are due April 30, July 31, October 31, and January 31. Annual wage reports (Form W-2 and W-3) are due January 31.

Sales Tax – Filing frequency (monthly, quarterly, or annually) depends on sales volume. Virginia’s sales tax rate is 5.3% state plus local add-ons; Ashburn’s combined rate is 6.0% .

Nonprofit Taxes to File (Form 990)

Tax-exempt organizations must file Form 990 annually. For calendar-year organizations, the deadline is May 15, 2026, with a six-month extension to November 15, 2026.

Which form to file:

  • Form 990-N (e-Postcard) – Gross receipts under $50,000

  • Form 990-EZ – Gross receipts under $200,000 AND total assets under $500,000

  • Form 990 (long form) – Gross receipts over $200,000 OR total assets over $500,000

  • Form 990-PF – Private foundations (any revenue level)

The IRS provides comprehensive instructions for Form 990-PF , including which parts of the form to complete based on foundation type and asset levels .

State and Local Taxes

Virginia Income Tax – Individual income tax returns are due May 1, 2026. Virginia has a graduated tax rate system, with rates ranging from 2% to 5.75%. You can check your refund status through the Virginia Department of Taxation .

BPOL Tax – All Ashburn businesses must pay the Business Professional and Occupational License tax. The license must be renewed annually by March 1. First-year businesses pay a flat fee of $30; subsequent years, the fee is $30 if gross receipts are $200,000 or less, with additional amounts for higher receipts .

Business Tangible Property Tax – Businesses must file an annual return reporting business personal property (furniture, equipment, computers, etc.) with the Loudoun County Commissioner of the Revenue.

Missing a Deadline

If you miss a filing deadline, file as soon as possible. The IRS imposes failure-to-file penalties of 5% per month, up to 25% of the unpaid tax. Virginia imposes similar penalties.

At Nova Tax & Accounting Services , our expert tax solutions team helps clients file all required returns accurately and on time. Schedule your free consultation to ensure you meet every deadline.