The Center for Taxpayer Rights is a nonprofit organization dedicated to furthering taxpayer rights in the U.S. and internationally.  We are a Virginia corporation recognized by the U.S Internal Revenue Service as tax-exempt under section 501(c)(3) of the US Internal Revenue Code.

Our leadership and management is composed of individuals who have dedicated their lives to championing the rights of taxpayers and access to justice, particularly for the most vulnerable populations.  We are incredibly fortunate to have their support and guidance.

Photograph of Jacqueline Lainez Flanagan, CTR's Deputy Director


Deputy Director 
Center for Taxpayer Rights


Jacqueline Laínez Flanagan joined the Center for Taxpayer Rights as Deputy Director in 2023. She previously served as the Founding Director of the Low Income Taxpayer Clinic (LITC) at the University of District of Columbia David A. Clarke School of Law, where she also taught Contracts, Federal Personal Income Taxation, and directed a Tax Policy Clinic as a pilot.

Jacq has served as a Visiting Professor of Law at American University Washington College of Law, teaching Legal Ethics, State and Local Taxation, and co-teaching in the Janet R. Spragens Federal Tax Clinic. Her other teaching appointments have included the University of Richmond, The George Washington University Law School, and the University of Memphis.  Her legal practice has primarily been comprised of tax, intellectual property, and nonprofit consulting. She has represented small businesses, social enterprises, and start-ups, as well as immigrant and low wage workers.

Her legal scholarship, community service, professional presentations, and media appearances have focused on the intersection between taxation and immigration, human rights, and corporate accountability. She earned a law degree from the University of Illinois Chicago School of Law, and LL.M degrees from Georgetown University Law Center (taxation) , and The George Washington University Law School (Friedman Fellow). She is licensed to practice in Washington, D.C., and admitted to practice before the United States Tax Court.

Photograph of Dulce Mascorro, CTR's pro bono and training coordinator.


Pro Bono & Training Coordinator
Center for Taxpayer Rights


Dulce Mascorro is the Center for Taxpayer Rights’ pro bono and training coordinator. In that capacity, she interacts with all of the Center’s volunteers and coordinates not only training for the volunteers but also the International Conference on Taxpayer Rights.

Dulce grew up in Ashe County, North Carolina, and later moved to Texas, where she attended the University of Texas and pursued a Bachelor of Interdisciplinary Studies degree, specializing in Business and Education (ESL, K-6). In 2019, Dulce moved back to North Carolina to work with marginalized populations and served as an ESL teacher with Lexington City Schools.  She later transitioned to become the district’s first Family Engagement Coordinator, working with families to address fundamental needs and provide advocacy within the community. She most recently served as Gear UP Administrator with Wilkes County Schools where she helped promote post-secondary attainment for at-risk youth. Dulce is passionate in the areas of social justice and dismantling systemic oppression.

Her favorite thing about the Center for Taxpayer Rights is the guidance we provide LITCs and how these LITCs, in turn, assist vulnerable and marginalized populations.


Executive Director and Founder,
Treasurer, Member,
Board of Directors
Center for Taxpayer Rights


Nina E. Olson is the Executive Director of the Center for Taxpayer Rights.  From March 2001 to July 2019, Nina served as the National Taxpayer Advocate of the United States, an independent organization within the Internal Revenue Service , dedicated to assisting taxpayers resolve their problems with the IRS and making administrative and legislative recommendations to mitigate those problems systemically.  She has submitted 39 annual reports to Congress, and testified before congressional committees over 60 times.  Before serving as the National Taxpayer Advocate, Nina founded and directed The Community Tax Law Project, the first independent Low Income Taxpayer Clinic in the US.  She also maintained a private legal practice, representing taxpayers in disputes with the IRS.

Nina has received many awards and recognitions, including the American Bar Association Section of Taxation’s Distinguished Service Award for Lifetime Service,  Pro Bono Award, and Jules Ritholz Memorial Merit Award for Outstanding Dedication, Achievement, and Integrity in the Field of Civil and Criminal Tax Controversies; the Tax Foundation’s Public Sector Distinguished Service Award; and Pro Bono Awards from the Virginia State Bar, the Virginia Bar Association, and the City of Richmond Bar Association.  In 2016 she was recognized by Tax Analysts as one of the Top 10 Outstanding Women in Tax (internationally).

Nina received her LLM in Taxation from Georgetown University Law Center, her JD from North Carolina Central University School of Law, and her AB (in fine arts) from Bryn Mawr College.

She is a member of the Virginia State Bar, and admitted to practice before the United States Tax Court, the Federal District Court of the Eastern District of Virginia, the 4th Circuit Court of Appeals, and United States Supreme Court.