Email Contact Us

Betty J. Williams

Managing Shareholder

Law Office of Williams & Associates, PC
Sacramento, California, USA

Law Firm

Professional Summary

Betty Williams has a broad range of experience handling civil and criminal tax controversy matters including income tax, employment tax, sales and use tax, property tax and IRS, FTB, and SBE audits, protests, and appeals. She has represented clients before the U.S. Tax Court and the U.S. District Courts in California. Betty has obtained penalty abatement for numerous clients ranging from a few thousand to more than $2 million in late filing and late payment penalties. She has assisted numerous clients in the United States and abroad in the 2009, 2011 and 2012 IRS and FTB voluntary disclosure initiatives. She also represents foreign financial institutions regarding Foreign Account Tax Compliance Act (FATCA) compliance. Betty represents clients in attorney-client fee arbitration matters and has obtained a favorable private letter ruling from the IRS. She has experience defending criminal tax matters and negotiating plea agreements in areas such as structuring, tax evasion, and the failure to file a tax return. Betty serves as the Chair and Commissioner on the Sacramento Regional Human Rights/Fair Housing Commission. She is the recipient of the prestigious Witkin Award for Estate and Gift Tax and was named Best Local Attorney for 2006 and 2007 by Sacramento News and Review, and was named a Northern California Super Lawyers Rising Star for 2011 and 2012. The firm was named a 2013 Tier 1 Tax Litigation "Best Law Firm" by U.S. News and World Reports.

Learn More


  • English

Industry Experience

    • Legal Industry


Law Office of Williams & Associates, PC
Sacramento, California, USA 95864
Managing Shareholder
Law Firm
2011 - Present
We handle all civil and criminal Federal and California tax controversy matters ranging from simple audits to complex litigation. We have proudly represented individuals and businesses in more than 30 states and numerous foreign countries and territories.

We specialize in tax compliance and case resolution regarding income tax, sales and use tax, estate and gift tax, employment tax, property tax and tax penalties before the Internal Revenue Service, California Franchise Tax Board, California State Board of Equalization, and California Employment Development Department. We also represent clients and have tried cases before the United States Tax Court, the United States Court of Federal Claims, the United States District Courts, as well as the Superior and Appellate Courts of California.

Additionally, we assist clients in all areas of general and complex estate planning, wealth preservation and business succession planning. We provide trust administration services, including trust accounting, distribution agreements, statutory obligations, and IRS filing requirements for trusts and estates.
Mopsick Williams, LLP
Managing Partner
2005 - 2011


LLM, Taxation 2007
Washington School of Law
South Jordan, Utah, United States
JD, Taxation Concentration 2003
University of the Pacific - McGeorge School of Law
Sacramento, California, United States
Honors: With Distinction
Honors: Witkin Award for Academic Excellence
Honors: Traynor Society
Honors: Dean's Honor List
BS, Business Administration 1989
California Sate University, Sacramento
Sacramento, California, United States

Bar Admissions

California State Bar

Court Admissions

  • U.S. Tax Court
  • U.S. District Court Northern District of California
  • U.S. District Court Southern District of California
  • U.S. District Court Eastern District of California
  • U.S. Court of Appeals, 9th Circuit

Associations and Societies

  • Executive Committee of the Taxation Section of the State Bar of California (Member)
  • California Tax Lawyer (Associate Bar Business Editor)
  • Sacramento Regional Human Rights/Fair Housing Commission (Vice Chair and Commissioner)
  • California State Bar Taxation Section (Former Chair and Officer, Estate and Gift Section)
  • Sacramento County Bar Taxation Section (Former Liaison to the IRS Tax Practitioners' Group)
  • State Bar of California, Taxation Section, Estate and Gift Tax Section (Former Officer and Chair)
  • Sacramento County Bar Taxation Section and Business Section (Former Officer and Chair)

Click To Write A Review

Contact Us Today