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Numbers not ready before the due date? File a business tax extension.

Your bookkeeper hasn't finished your year-end numbers, and the due date is close. Your business risks a monthly IRS penalty for each owner on a late return. We file your business tax extension and prepare your partnership or S corp return. With a valid extension, you get six more months to file a complete return.

  • 150+ business clients
  • Video calls or a visit to our office

Business tax extension filing, start to finish

  1. 1. Send last year's business return

    Upload it through our secure link. Add your current profit and loss statement. Tell us your year end and whether your books are finished.

  2. 2. We file the extension request

    We file Form 7004 for the business before the due date. We then quote the year's work in writing, including any owners' personal returns, and hold that price for the work we listed.

  3. 3. Filed within the extension

    Your partners or shareholders get the numbers they need for their own returns. The business return is signed and filed with the IRS.

Partnership and S corp due dates for 2027

For a calendar-year partnership or S corporation filing its 2026 return:

  • March 15, 2027:return due, or Form 7004 filed
  • September 15, 2027:extended deadline for the complete return

A fiscal-year business has different dates. We confirm yours when you send last year's return.

Client meeting room at the Maris & Associates CPAs office in Everett

Business tax returns from our Everett office

Our Everett, Washington team prepares federal business returns for S corporations, partnerships and LLCs, plus Washington business tax and multi-state filings. We track your filing dates and tell you in January what each one needs. Sara Stegall, JD, our Senior Tax Law Analyst, advises owners on entity structuring. Walk-ins are welcome at the office.

  • 40+Years in business
  • < 24hAverage response
  • 1,000+Clients served

Every return checked by a Washington-licensed CPA before signing

Send last year's business return, and we reply with a written quote we hold for the work listed.