Guiding businesses through the complex world of sales tax with precision, technology, and trusted expertise.
DDH Advisory LLC (DDH) is a veteran-owned sales tax consulting firm providing expert sales tax consulting services, with a strong focus on guiding businesses through the complexities of sales tax software implementation. Implementing a sales tax engine is a complex process that requires more than just technical know-how. It demands deep tax expertise to ensure accuracy, compliance, and efficiency. Our team provides the specialized sales tax knowledge essential for a successful implementation, bridging the gap between technology and tax compliance.
Partner
Terrell Davis is a Partner at Davis Davis & Harmon LLC (DDH) with more than 27 years of experience in sales and use tax consulting. He specializes in operational strategy, tax technology, and multi-state audit defense, helping companies identify overpayments, reduce risk, and improve compliance efficiency.
Partner
Deon Harmon is a Partner at Davis Davis & Harmon LLC (DDH), where he leads client relationships and strategic partnerships. With more than 28 years of experience in sales and use tax consulting, Deon specializes in audit defense, refund recovery, tax technology, and compliance process improvement. His leadership helps ensure DDH delivers exceptional value and measurable results for clients across industries.
Before joining DDH, Deon served as a Sales Tax Auditor for the Texas Comptroller’s Office, Engagement Manager for a mid-size accounting firm, and Client Service Representative at a Big 4 firm. He holds a Bachelor of Business Administration in Accounting from Langston University and is a member of the National Association of Black Accountants and the Institute of Professionals in Taxation.
Partner
Chanel Christoff Davis is a Partner at Davis Davis & Harmon LLC (DDH), the nation’s largest woman- and minority-owned sales tax advisory firm. With more than 20 years of experience in tax strategy and business leadership, Chanel guides the firm’s vision and client success, helping Fortune 500 and Global 100 companies recover overpaid taxes and strengthen compliance.
Before founding DDH, Chanel was a Senior Consultant at a Big 4 firm, specializing in financial statement and 401(k) audits. She is a sought-after speaker and host of the Follow the Leader podcast, featuring inspiring business stories. Chanel serves on the boards of the Women’s Business Council–Southwest and the WBENC Forum, and is a member of Delta Sigma Theta Sorority, Inc., the National Association of Black Accountants, and the Institute of Professionals in Taxation. She holds dual bachelor’s degrees in Accounting and Management from the University of New Orleans and is a Goldman Sachs 10,000 Small Businesses alumna.
Delivering cutting-edge sales tax solutions to minimize our clients’ tax burdens and compliance risks.
Champion veteran-owned business partnerships, ensuring that the economic impact of veteran entrepreneurship is fully realized.
By aligning with corporate partners and fellow veteran-owned businesses, DDH Advisory LLC is not just building a business, we are creating a platform for veteran entrepreneurs to thrive in high-value industries.
We believe that the leadership, problem-solving expertise, and operational excellence honed through military service yield innovative and effective business solutions.
These guys worked with me on a sales tax audit from hell. Their negotiation and business knowledge of the Texas Comptrollers office was the king pin in our success.
Quick response, knowledgeable, helpful. Recommend.
DDH Advisory LLC, a veteran-owned firm, combines deep tax expertise with technical know-how to guide businesses through seamless and compliant sales tax software implementation.