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Representing Clients Nationwide from
Simple to Complex Tax Controversy Matters
Mopsick & Williams, LLP is a uniquely qualified and highly specialized
law firm dedicated to providing clients with the finest legal representation in taxation.
Our practice focuses on issues of tax controversy, including income tax, sales and
use tax, estate and gift tax, employment tax and property tax.
The firm handles all Federal and California tax matters ranging from audits to
appeals to court representation, including complex issues such as off-shore compliance
and corporate tax matters.
In addition, our practice assists clients with tax-saving opportunities available to
individuals and businesses under federal and state tax laws.
Betty Williams was named Best Local Attorney for 2006 and 2007 by Sacramento News & Review.
Steven Mopsick is admitted to practice in Washington, D.C., Massachusetts, and before the U.S.
Tax Court only. He is not admitted in California.
Here is a sample of the services that we provide for our clients:
- All California and Federal Tax Matters
- IRS Civil and Criminal Investigations
- False or Fraudulent Tax Returns
- Tax Litigation
- IRS Collections
- Amnesty Defense
- Bank Levy Defense
- IRS Notice Response
- Response to IRS Special Agents
- Private Letter Rulings
- IRS Summons Defense
- California Franchise Tax Board Audits
- Sales Tax, Use Tax, Property Tax, Transit Tax Defense
- IRS Audits and Appeals
- Offers in Compromise and Installment Agreements
- Innocent Spouse Defense
- Testify as Expert Witness
- Grand Jury Representation
- Income and Collections Matters
- Tax Shelter and Promotor Defense
- Offshore Assets in UBS and other Swiss Accounts
- Defense of Offshore Tax Havens
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- 30 Day Letter
- Tax Evasion Defense
- Interpretation of IRS Revenue Rulings
- Statutory Notice of Deficiency Response
- Seizure and Jeopardy Assessment Defense
- IRS and California Employment Tax Audits
- Non-filer, Unfiled and Failure to File Status
- Lien, Levy and Garnishment Appeals and Removal
- Negligence and Fraud Penalty Abatement and Defense
- International Tax Compliance, Competent Authority and Tax Treaties
- TEFRA, Pass-Through, Partnership, Subchapter S, LLC and LLP Examinations
- Representing practitioners in disciplinary actions before the IRS Office of Professional
Responsibility and other Circular 230 matters
- Fifth Amendment Concerns
- Tax Violations of U.S. Banking and Securities Laws
- Compliance Failures
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