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PrietoDion Consulting Partners LLC
              Tax Consultants for the U.S. and International (non-U.S.) Businesses              

PrietoDion Consulting Partners is a Tax Advisory Firm specializing in advising and assisting U.S. and non-U.S. Businesses with Understanding and Managing their Multi-State Tax Obligations.  We provide our State & Local Tax (SALT) advisory services to businesses located throughout the United States and in Europe, Canada, Australia, New Zealand and Latin America. 

PrietoDion Consulting Partners LLC was founded and is managed by Sylvia Dion, CPA. Prior to launching PrietoDion Consulting Partners, LLC, Sylvia's 28+ years of professional tax experience include holding SALT Senior Management and Leadership positions with Ernst & Young (EY) and Grant Thornton, including serving as the New England Area Director of Employment Tax Services for EY.  In addition to her public accounting experience, Sylvia has also worked in the corporate tax departments of several high-tech, software and manufacturing companies. 

Currently, Sylvia specializes in providing State & Local Tax (SALT) consulting and compliance services to businesses within the US and from many parts of the world. Additionally, Sylvia's SALT focus covers many industries, including online retail, software (including SaaS providers), digital product vendors, and manufacturers. 

In addition to providing tax consulting services and solutions, Sylvia is a speaker, writer and avid tax blogger. Her articles on SALT issues and developments have been published in the Journal of Accountancy, Journal of State Taxation, Journal of Multistate Taxation and Incentives, Journal of Practical US/Domestic Tax Strategies, Bloomberg BNA Tax Management Multistate Tax Report, Bloomberg BNA Weekly State Tax Report, Tax-Analysts State Tax Notes, and Institute for Professionals in Taxation (IPT) Tax Report. Sylvia is also the author of the "Minding Massachusetts" column published quarterly in Tax Analysts - State Tax Notes. She also frequently presents to executive and industry groups and on practitioner webcasts and has been quoted in several news reports and articles, including in Bloomberg BusinessWeek, the Boston Globe, Forbes.com, NPR and other media.

Sylvia is also regarded as an authority on SALT Nexus Issus, Economic Nexus, Marketplace Tax Laws, state "Amazon Laws" and prior Federal "Internet Sales Tax" legislation.  As a Massachusetts based practitioner, Sylvia is also regarded as a subject matter expert and top adviser on Massachusetts tax issues. Her writing and blogging efforts have also focused on Massachusetts tax developments, including authoring articles and blogs on significant Massachusetts tax developments, such as the enactment and repeal of the Massachusetts' "tech-tax", Massachusetts' adoption of economic nexus, enactment of the Massachusetts recreational Marijuana law, Massachusetts' efforts to enact a "Millionaire Tax," and on several key Massachusetts court decisions. 

She holds a Bachelor in Business Administration (BBA) - Accounting from the University of Texas at El Paso, and a Masters in Professional Accounting (MPA) - Taxation Specialization, from the Red McCombs School of Business at the University of Texas at Austin.  Sylvia is a Certified Public Accountant (CPA).

Sylvia has been happily married for 28+ years, is the mother of a 24 year-old son and 19 year old twins, is a passionate foodie and cook, is fluent in Spanish and proficient in French. 

You can connect with Sylvia in the following ways:

Email:  sylviadion@prietodiontax.com

LinkedIn: http://www.linkedin.com/in/sylviadioncpa,  

Twitter:  @SylviaDionCPA,  

Skype:  @sylviadion@hotmail.com  

Interested in learning more about my services? 
Visit the Services webpage or Contact me

Interested in viewing my complete list of presentations, publications, blog articles, etc.?  View my Publications section at my LinkedIn Profile

Interested in having me present to your organization? Contact me.

News and Article Links

Sylvia Dion makes FORBES - the TaxGirl's "100 Must-Follow Tax Twitter Accounts" for 7th Consecutive Year (2015-2021)

Sylvia Dion interviewed in Forbes.com article, "Sylvia Dion CPA Asks - Where Are the Women?", 
by Peter J. Reilly  Article Link

Select Published Tax Articles (Available for viewing/download by clicking on article link )​

"US Supreme Court Overturns Physical Presence Standard," published in Leading Internet Case Law, August 2018

"MFA v RTPA: Will Changes in the House and An Expiring ITFA Help or Further Stall Federal Report Seller Bills," published in Bloomberg BNA Weekly State Tax Report

"From Click-Through to Marketplace to Economic Nexus: How Far Will States Push the Nexus Envelope on Remote Sellers?," published in Bloomberg BNA Weekly State Tax Report 

"Alibaba Differs From U.S. - Based Remote Sales Behemoths, But the Competitors Could Face Similar Sales Issues", published in Bloomberg BNA Weekly State Tax Report.

"U.S. Supreme Court May Rule on the 'Click-Through' Nexus," published in E-Commerce Law & Policy

"The Massachusetts 'Tech-Tax' Fiasco: It's History, Impact and Valuable Lessons Learned." published in the Institute for Professionals in Taxation (IPT) Tax Report

Sylvia Dion quoted in "It's Retailer vs. Retailer in Internet Sales Tax Push", Bloomberg BusinessWeek