Tax Services for Centennial, CO

Reliable tax preparation, planning, and bookkeeping for Centennial individuals and businesses—secure, simple, and locally accessible.

Serving Centennial From Our Aurora Office

If you’re located in Centennial and searching for tax services in Centennial CO, you want to know whether the firm will truly work with you—not just list the city on a website.


Yes, we serve Centennial clients regularly. Mark Christiansen Associates LLC operates from our Aurora office and supports individuals and businesses throughout the Denver Tech Center and surrounding metro communities.

Do you serve Centennial?

Yes. Many of our clients live or operate businesses in Centennial and work with us remotely or by appointment.

Tax & Accounting Services for Centennial Clients

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Centennial Tax Preparation

Accurate individual and business tax return preparation, including e-filing and organized document review.

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Centennial Bookkeeping

Monthly reconciliation, financial statements, and ongoing support for small businesses and self-employed professionals.

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Centennial Tax Planning

Year-round planning that coordinates income, deductions, and business decisions before deadlines.

If you’re comparing Centennial CPA options, our process emphasizes clarity, secure tools, and direct communication.

Secure Portal Access From Anywhere in Centennial

You don’t need to drive across town to drop off paperwork.


Can I use a secure portal if I’m in Centennial?

Yes. Our encrypted client portal allows you to:


  • Upload tax documents securely
  • Review completed returns online
  • Sign electronically
  • Pay invoices through a secure payment link


Portal-based document exchange keeps the process organized and avoids sending sensitive information through email.

Established Since 1986—Local Metro Support

When evaluating a Centennial tax accountant, experience matters. Mark Christiansen Associates LLC has served the Aurora and greater Denver metro area since 1986. Our long-standing presence reflects consistent service and long-term client relationships.



We combine metro-area accessibility with a published office address and direct phone support—so you know exactly who you’re working with.

Looking for a Tax Accountant Near Centennial?

If you want:


  • A straightforward, client-first process


  • Secure online tools


  • A real office and direct phone number



  • Established local experience


We’re ready to help.