Why Sales Tax Helper?
Software automates compliance. Law firms litigate. Sales Tax Helper is the only platform that does both, from a free nexus and liability checker to full audit defense, with a team that does nothing but sales tax.
Software can't defend you in an audit
Avalara, TaxJar, and Numeral are powerful automation tools, but when a state sends an audit notice, they hand you off. Sales Tax Helper stays in your corner through audit, appeal, and if necessary, litigation.
Law firms don't understand sales tax
Most traditional tax attorneys are generalists. Sales tax is its own discipline with state-specific rules, audit tactics, and agency relationships that take years to master. Our team focuses exclusively on sales tax. Nothing else.
Former state auditors on our team
We know how audits are conducted because our team ran them. That inside knowledge of how state agencies operate, what they look for, and how they settle is a material advantage that no software company or general law firm can replicate.
Fixed fees. No hourly billing.
Traditional law firms charge by the hour with no ceiling. We offer fixed-fee pricing and tiered service levels, so you know exactly what you're paying and only pay for the level of support you actually need.
Side-by-Side Comparison
See what each option actually covers — and where the gaps are.
| Feature | Sales Tax Helper Platform + Experts | Avalara Software | TaxJar Software | Numeral Software | Law Firm Hourly billing |
|---|---|---|---|---|---|
| Sales tax calculation & automation | ✓ | ✓ | ✓ | ✓ | ✕ |
| Multi-state filing & remittance | ✓ | ✓ | ✓ | ✓ | ✕ |
| Nexus monitoring & alerts | ✓ | ✓ | ✓ | ✓ | ✕ |
| Sales tax registration | ✓ | ✓ | ✓ | ✓ | Limited |
| Exemption certificate management | ✓ | ✓ | Limited | ✓ | ✕ |
| Free tools & nexus checker | ✓ | ✕ | ✕ | ✕ | ✕ |
| On-demand consulting with real experts | ✓ | ✕ | ✕ | Limited | Hourly only |
| Former state auditors on staff | ✓ | ✕ | ✕ | ✕ | ✕ |
| Audit defense & representation | ✓ | ✕ | ✕ | ✕ | ✓ |
| Appeals representation | ✓ | ✕ | ✕ | ✕ | ✓ |
| Tax court / litigation support | Via Sales Tax Legal | ✕ | ✕ | ✕ | ✓ |
| Voluntary Disclosure Agreements | ✓ | Limited | Limited | ✕ | Limited |
| Tiered pricing — pay for what you need | ✓ | ✕ | ✓ | ✓ | ✕ |
| Fixed-fee pricing (no hourly surprises) | ✓ | ✕ | ✓ | ✓ | ✕ |
| U.S. sales tax focus (not generalists) | ✓ | Partial | Partial | Partial | ✕ |
● Highlighted rows indicate where Sales Tax Helper is uniquely differentiated from software-only solutions.
Software stops at compliance.
We go further.
Avalara, TaxJar, and Numeral are excellent at what they do: automating calculation, filing, and remittance for businesses that are already compliant. But the moment you receive an audit notice, a state assessment, or a demand for back taxes — those tools have nothing to offer you.
Traditional law firms fill some of that gap, but most tax attorneys are generalists. They charge high hourly rates, their staff learns your industry on the job, and they have never sat across the table from a state auditor.
Sales Tax Helper was built to close that gap. Real sales tax experts, CPAs, and former state auditors available at every tier, from a free nexus and liability check to full audit defense and appeal representation. Fixed fees. No surprises.
Get Started FreeAlready in a dispute?
If your situation has escalated to formal legal proceedings, Sales Tax Legal provides full attorney representation for audits, appeals, and tax court — exclusively focused on sales tax.
⚖️ Visit Sales Tax Legal →Switching from Avalara or TaxJar?
We work alongside your existing compliance software or replace it entirely — depending on what you need. Start with a free consultation and we will tell you exactly where your gaps are.
Talk to an Expert →The only platform that covers the full spectrum.
Free tools. Expert consulting. Audit defense. Appeals. All under one roof.