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Multistate Tax Compliance Solutions

Minimize risk and administrative burden while staying ahead of evolving state and local tax rules.

Multistate Tax Compliance Solutions | State & Local Tax Compliance

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Multistate and International Tax Obligations Are Complex. Navigating Them Shouldn’t Be.

When your business crosses state or international lines, tax obligations can multiply quickly—and not always in straightforward ways. Factors such as sales volume, physical presence, employees, inventory, and marketplace activity all influence where and how you are required to comply with state and local taxes. But not every obligation is clear-cut. Meeting multi-state tax filing requirements often calls for thoughtful interpretation, weighing regulatory requirements against operational realities, and making informed decisions that balance risk, cost, and complexity.

AAFCPAs delivers multistate tax compliance and consulting solutions that help you manage complexity with confidence. Whether you operate in three states or across borders, our team brings clarity to your filing requirements, helps reduce exposure, and responds promptly when questions arise.

Sales Tax Automation Software with SALT Specialists Who Guide You Through Complex Regulations

Our powerful tax automation software streamlines multistate and international tax management—but it’s our people who make the difference. AAFCPAs’ engaged SALT professionals are just a phone call away, ready to interpret the gray areas, answer your questions, and help you stay confidently compliant.

Multistate tax compliance calls for more than timely filings. It requires fluency in shifting regulations, jurisdictional nuance, and the foresight to anticipate how tax positions will hold up under scrutiny. AAFCPAs brings structure and clarity to the process—combining smart technology with a highly engaged SALT team who understands the real-world pressures of compliance across jurisdictions.

Our professionals work directly with clients—reviewing notices, clarifying obligations, answering nuanced questions, and offering perspective shaped by hundreds of client scenarios. Technology helps streamline filings, but it is our people who interpret gray areas, respond to regulatory changes, and help you weigh the business implications of each decision. When complexity arises, you have someone to call who understands both your business and the tax landscape.

Benefit from:

  • Consistent, accurate filings supported by tax automation software
  • Guidance tailored to your structure, industry, and geographic reach
  • Timely answers from professionals who stay engaged

Streamlined Tax Compliance Solutions for Multistate and Canadian Operations

Our multistate tax compliance solutions include sales and use tax registration and returns, exemption certificate management, advance payment calculations for industries such as cannabis retail, and income tax filings for corporations, partnerships, individuals, and trusts. We also offer Canadian GST/PST compliance, voluntary disclosures, correspondence management, and audit preparation and response. Each engagement is tailored to the structure and scale of your operations, with a focus on consistency, efficiency, and risk mitigation across jurisdictions.

  • “AAFCPAs is an invaluable partner when navigating the complexities of State and Local Tax (SALT) and compliance. Their team provides clarity on sales tax requirements and nexus analysis—especially critical for SaaS companies given the varying tax definitions across states. They take the time to walk us through everything, ensuring we understand the implications as we expand into new markets. Their expertise not only simplifies compliance but also positions our business for sustainable growth.”

    Tammy Johnson President & CEO, Co-Founder Atrium Campus

  • “I am impressed with the multi-state tax expertise of AAFCPAs. Their specialists demonstrate great knowledge of the landscape in the jurisdictions where we do business. I experienced a unique appreciation for my need to manage risks appropriately, and I am very pleased overall!”

    Joseph Roth, Former COO/CFO South Shore Millwork

  • “I highly recommend AAFCPAs’ diverse tax solutions to any of my peers. Over the years, Vista Higher Learning, Inc. has utilized and benefited greatly from AAFCPAs’ SALT consulting, income tax compliance and consulting, and strategic planning around acquisitions and strategic initiatives. Their proactive tax advice is well thought out and has been proven over time. We have grown over the years and now sell in all 50 states. Their corporate guidance comes with detailed options, which are well explained, in addition to insightful scenarios to guide our decision-making process. They are fully invested in getting to know us, our structure, and how our owner’s personal tax situation interrelates and weaves into the business decisions we make. Regardless of the complex scenario, we all have complete confidence and trust in AAFCPAs’ tax expertise. They fully understand our history, who we are now, and where we are going.  Our relationship is a great business partnership and one that we appreciate as rare, valuable, and hold in the highest regard.”

    Joseph DiGiantommaso, VP of Finance Vista Higher Learning, Inc.

Let’s Connect

Kelly Zack

Kelly Zack

MST | Partner, State & Local Tax (SALT)
Julie Sauriol
Chevalier-Julie

Julie Sauriol

CPA | Tax Partner
Brian O’Hearn
Brian O'Hearn

Brian O’Hearn

CPA, MSA | Tax Manager

Contact Us

We look forward to speaking with you to determine how we may best solve your needs. A firm representative will reach out to you within one business day. Looking for additional ways to reach us? Visit our Contact Page. >>