“Diane is one of the foremost experts in the field of sales and use tax law in the US. She has not only an in-depth knowledge of sales and use tax but, more importantly, knows how to help her clients implement and enforce tax policy in the most efficient and effective way."

—Mehrdad Talaifar, VP Partner Network, Sabrix, Inc., Business Partner


Diane L. Yetter, CPA, MST is a strategist, advisor, speaker and author in the field of sales and use tax. She is president and founder of YETTER Tax, a sales tax consulting and tax technology firm in business since 1996.

She is also founder of The Sales Tax Institute, a premier think tank that offers live and online courses to educate business professionals about sales and use tax.  As one of the leading sales and use tax experts, Diane was named one of Accounting Today‘s 100 Most Influential People in Accounting for 2011, 2012, 2017, 2018 and 2019.


Diane works with an extensive network of capable partners to deliver sales tax services including system analysis and strategy, Vertex and Thomson Reuters OneSource Indirect Tax Determination implementation assistance, training, audit defense, refund reviews, manuals, transactional planning and general consulting concerning the taxability of issues.

She works with clients of all sizes—from Fortune 10 to small, family-owned companies—and myriad industries such as manufacturing, printing and publishing, software and e-commerce, retail, service and construction.

She is a Certified Implementation Partner and Trainer with Thomson Reuters ONESOURCE Indirect Tax, a Certified Training and TDM Specialist for Vertex, Inc. and a Business Partner of Avalara and Vertex SMB.

Download Diane’s full bio here.