Sales Tax | Blog

Tax Compliance & Automation: When It Works & How to Use It

Written by Robert Dumas | Thu, Jan 30, 2025 @ 04:01 PM

AI and automation are everywhere, but do they belong in your sales tax compliance process? The short answer: yes, but only partially.

As businesses grow and operate across multiple states, the need for sales tax automation becomes clearer. But it’s equally important to know where automation helps, and where it falls short.

Where Automation Fits in Sales Tax Compliance

Sales tax compliance starts with accurately calculating and charging the right tax on each transaction. With thousands of tax jurisdictions in the U.S., this is where automation shines.

Why Use Sales Tax Automation?

Sales tax rates and taxability rules vary by:

  • State
  • County
  • City
  • Product or service type

Most sales tax calculation software is cloud-based (SaaS) and integrates directly with your invoicing, ecommerce, or ERP systems. When a customer makes a purchase or an invoice is created, the software uses key data; such as customer location, transaction amount, and product type, to:

  • Determine taxability
  • Apply the correct tax rate
  • Calculate sales tax
  • Return the tax amount to be shown on the invoice or website

If you’re selling across multiple states or offering a mix of products and services, automated tax calculation is often a must.

Where Automation Falls Short in Sales Tax Compliance

While tax automation software is a valuable tool, it’s not a complete solution. There are several parts of sales and use tax compliance that still require human oversight and expertise.

1. Tracking Changing Nexus

Automation won’t automatically detect when you’ve established economic or physical nexus in a new state. If your business expands, hires remote employees, or surpasses sales thresholds, someone needs to manually review and update your compliance footprint.

2. Managing Filing Frequencies

As your tax liability grows, your filing frequency may need to change (e.g., from quarterly to monthly). Automated tools don’t always recognize or adjust for this, leaving you vulnerable to missed deadlines.

3. Handling State Notices

Tax notices often arrive by mail or are posted in state e-file systems. These can include audit requests, late payment alerts, or rate changes. Software alone won’t monitor or resolve these issues.

4. Managing Non-Sales-Tax Liabilities

Some tax types like the Washington Business and Occupation (B&O) tax or the Ohio Commercial Activity Tax (CAT) aren’t included in most sales tax systems. These must be tracked and filed separately.

Customer Credits & Refunds: A Major Challenge for Automation

Let’s say you collect sales tax on an invoice, remit it, and later the customer:

  • Returns the item
  • Sends an exemption certificate after the fact

Now you’ve overpaid sales tax to the state. What do you do?

  • File an amended return?
  • Apply the credit to a future tax period?

What Automation Users Say

In a recent TaxConnex survey of finance professionals, respondents who use sales tax software revealed that the following areas are not handled by automation:

  • Monitoring transaction thresholds
  • Responding to state tax notices
  • Making adjustments for late exemptions or customer credits

The promise of automation is “hands-off” compliance, but in reality, software alone can’t fully manage your risk.

When to Consider Outsourcing Sales Tax Compliance

If managing sales tax is eating up too much of your time, or you don’t have a tax expert on staff; it may be time to outsource your sales tax process.

An ideal solution combines:

  • Automated software
  • Human oversight
  • Tax expertise

At TaxConnex, we blend technology with dedicated practitioners who monitor changes, interpret notices, adjust settings, and ensure full compliance; something software alone just can’t offer.

Final Thoughts: Automation Is a Tool, Not a Strategy

Automation plays an important role in sales tax compliance, but it’s not a substitute for expertise.

To stay compliant and minimize risk, businesses need:

  • A clear sales tax strategy
  • Ongoing nexus and taxability reviews
  • Support to manage evolving tax laws and edge cases

Whether you use software, outsource, or combine both, what matters most is being proactive and accurate with your sales tax obligations.

Don’t Let Sales Tax Get Out of Control

If you're unsure whether your automation setup is enough, or if you're juggling sales tax with no clear plan, it's time to talk to an expert.

Contact TaxConnex to learn how we combine automation with expertise to take sales tax off your plate for good.