Sales and Income Tax Advisory Network

Creating a network of sales tax support for businesses, associations and tax professionals.
Learn more about us and request a free consultation today.

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Sales Tax Services


– Businesses
– Tax Advisors
– Associations
Vendors/General Contractors


-Active Audit
-Reverse Audit
-Past Audit

Multi-State Nexus
& Taxability Review

– Do Business in Multiple States
– Want to Do Business in Multiple States


– Webinars
– Seminars
– Custom Training

About Us

The Sales and Income Tax Advisory Network provides sales tax education, training, expert resources, and support for businesses, organizations, and tax advisors.

The majority of sales tax filers are small businesses. According to the Wisconsin Department of Revenue’s most recent statistics, approximately 70% of businesses reporting sales tax had total taxable receipts of less than $500,000 in 2017. Small businesses also have the fewest resources for navigating the complex tax laws.

Our CEO, Holly Hoffman, spent the last 8 years as an auditor, speaker, and technical tax specialist for the Wisconsin Department of Revenue. Drawing upon her experiences and the feedback she received at presentations to small businesses around the state, she shaped the Sales and Income Tax Advisory Network to provide businesses with affordable options for staff training and access to sales and use tax experts for guidance.

Holly Hoffman

Founding Partner, CEO


Holly Hoffman, CEO of Sales & Income Tax Advisory Network bio picture.

Sales & Use Tax Compliance Assessment

Schedule your assessment today!

A Sales and Use Tax Compliance Assessment is a service that will get your company on the right track! For a flat fee of $1,000 you will receive a high-level review of your sales and use tax system at your business location.

The half day assessment includes a review of the following:

  • Previous four years of sales tax returns
  • Sales and use tax policies and procedures
  • Sales
  • Exemption certificates
  • Purchases

During the assessment you will learn:

  • What auditors look for
  • Answers to your tax questions
  • Any activities that may cause an audit of your business, and
  • Opportunities for refund claims will be identified.

Upon completion of the assessment, you will receive a summary report prioritizing the steps you need to take to reduce your audit risk. 

Sales & Use Tax Audit Relief

Get your first 5 hours of audit defense @ $200/hour and receive the next 5 hours of audit defense at no charge. 

Are you under audit during the State mandated shutdown?

Whether you were under audit prior to the mandated closure of non-essential business activities or you received an audit notice since COVID-19 became the trending news story…

Enlist the help of a former WI Dept. of Revenue auditor to protect your rights and your business:

  • Reduce records requests
  • Minimize tax assessment
  • Minimize or eliminate penalties
  • Speed up the audit
  • Find tax you overpaid and get your refund

Hire someone who knows the tax law and understands how the audit process works to work for you.

Advisory Board - Sales & Income Tax

Sales & Income Tax Advisory Network Mission

Our Mission

Our mission is to provide sales tax education and support to businesses, associations, and tax professionals to build a network of empowered taxpayers.

Our Advisory Board

Holly Hoffman
Doug Gross
Jack DeYoung

Meet the Board Members