Sierra Tax Services is here to help both retail and business clients with all your tax needs at an affordable price. Tax season doesn’t need to be stressful; I am here to work with you every step of the way so you can file confidently.

My goal is to develop long, lasting relationships with my clients and create a long-term tax strategy that optimizes your income.

​Taxes are not just a seasonal event, Sierra Tax Services is open year-round to provide clients instant analysis or advice on any taxable decisions! ​

"An investment in knowledge pays the best interest"

-Ben Franklin

I am a firm believer in continual personal development, and I apply that to my tax practice. Through continued education and learning opportunities, I am committed to staying up to date on tax law and best practices.

Offering a Modernized Tax Practice

  • IRS Recognized Enrolled Agent
  • Year-Round Tax Practice
  • Personalized Presentation and Tax Analysis
  • E-Filing Included (Available for all 50 States)
  • Virtual or In-Person Meetings


Personal Income Tax

Minimize your tax liability to optimize your income now and for the future

STS Commitment
  • Prompt Communication

  • Client Engagement

  • Detailed Tax Preparation & Analysis

  • Welcoming, Family-Friendly Atmosphere.


Small Business Tax

Strategically working with small businesses to capture credits, deductions, expenses, etc 

STS Commitment
  • Work as an extension of your operation

  • Bring a hands-on approach to provide tax saving strategies

  • Capture all credits, deductions, expenses etc.

  • Allow you to focus on managing your operation

Our Staff

Christian O'Connor, EA
Enrolled Agent
Office Manager
Head of Security
Show More

What is an Enrolled Agent?

An enrolled agent has earned the privilege of representing taxpayers before the Internal Revenue Service by passing a three-part comprehensive IRS test covering individual and business tax returns. Enrolled agent status is the highest credential the IRS awards. Individuals who obtain this elite status must adhere to ethical standards and complete 72 hours of continuing education courses every three years.

Enrolled agents, like attorneys and certified public accountants (CPAs), have unlimited practice rights. This means they are unrestricted as to which taxpayers they can represent, what types of tax matters they can handle, and which IRS offices they can represent clients before.

  • White LinkedIn Icon
  • White Facebook Icon

© 2020 by Sierra Tax Services. Proudly created with

Find us at:
501 Nathan Lane Suite #4
Elkhorn, WI 53121
Phone: 262-723-3898
Cell: 262-408-0210
Fax: 262-723-3898