Mabstac, LLC ( provides tax preparation services in a manner that software packages can’t. Do you feel unsure of your tax position after using a tax software?

Mabstac, LLC ( provides tax services in all areas of taxation, including individual, corporate, estate, partnership and federal, local and state taxes. Our CPAs have deep tax law knowledge and experience and will work to maximize your tax savings, remove the doubt you have when you prepare your own tax returns, and take the guesswork out of tax preparation when using a tax software. Mabstac, LLC ( is located in Fairfax, Virginia; however, we serve individuals and businesses nationwide.

Our team focuses on providing you with the most relevant and practical advice, founded in our deep tax law knowledge and business experience. Every project is planned carefully and we believe in transparent, frequent communication. We want you to understand how to reduce your tax burden and to help you plan for your future – accurately calculating taxes so that businesses and individuals do not overpay is our goal. Do you know anyone who is generally excited about paying taxes, much more paying more taxes than they should? You different circumstances requires more than a tax software.

Every individual is different, and so we want to make this process and experience pleasant for you. Consequently, our professionals keep up-to-date with the changing tax laws, as well as your changing life events, such as the birth of a child, a new business, new home, or inheritance(s). Our CPA professionals also adhere to certain ethical standards and codes of professional conduct established by the IRS and professional organizations.

In addition to serving your tax preparation and consultation needs, we have developed this website to keep you up-to-date with the latest tax law changes and tax planning strategies. We are also duty bond to maintain copies of your returns for a certain period of time; therefore, you can access past returns by contacting us or through our secured site. Do you want to keep up-to-date with the latest tax news and information, and how this impacts your tax position? If so, use this site to stay in touch with tax matters affecting you by signing up for our newsletter.

Ready to get your tax return prepared?

  1. Make an appointment (not required but recommended)
  2. Gather the documents (see document list)
  3. Upload (or send us) your documents (login required)
  4. Complete a simple tax questionnaire (login required)
  5. We will crunch the numbers for you and contact you to complete