About Sales Tax Helper
Built by sales tax experts. Staffed by real specialists. Designed for businesses that need more than generic software.
Gerald J. Donnini II, Esq.
Jerry grew up in a small family business in South Florida. He watched his family navigate robberies, payroll crises, storms, and the constant pressure of government compliance. That experience gave him something most people in this industry never get: a real understanding of what it means to run a business and how much is at stake when the government comes knocking.
After more than a decade in sales tax, Jerry had seen the same pattern repeat. Businesses would get buried by a state audit, handed off to a generalist law firm that charged $500 an hour and learned sales tax on the job, or left to navigate it alone with compliance software that stopped being useful the moment the audit notice arrived.
He built Sales Tax Helper to close that gap. One platform. Sales tax experts, CPAs, and former state auditors who do nothing but sales tax. A free nexus and liability checker to start, paid tiers from DIY up to full audit defense. No generalists. No surprises on the bill.
Start Your Free AccountOur Mission
Every business deserves real sales tax expertise, not generic software and not an overpriced generalist. Sales Tax Helper exists to provide exactly that: sales tax experts, CPAs, and former state auditors focused on nothing but sales tax, at every price point.
Some matters require formal legal representation. Sales Tax Legal is our affiliated law firm: sales tax audits, appeals, and tax court.
Founded by Gerald J. Donnini II, Esq. Sales tax law only.
Why Sales Tax Helper?
Decades of combined experience in sales tax, CPA practice, and state auditing.
Flexible tiers that grow with your business. Start free, scale when you need to.
Clear pricing. No hidden fees. Pay for what you need, nothing more.
Sales Tax Helper vs. Everyone Else
Software automates. Law firms litigate. We do both, and everything in between.
Software can't defend you in an audit
Avalara, TaxJar, and Numeral are powerful tools, but when an audit notice arrives, they hand you off. We stay in your corner through audit, appeal, and litigation.
Law firms don't specialize in sales tax
Most tax attorneys are generalists. Sales tax is its own discipline. 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 is an advantage no software company or general law firm can replicate.
Fixed fees. No hourly billing.
Traditional law firms bill by the hour with no ceiling. We offer fixed-fee pricing and tiered service levels. You know exactly what you're paying.
| Feature | Sales Tax Helper | Avalara | TaxJar | Numeral | Law Firm |
|---|---|---|---|---|---|
| Sales tax calculation & automation | ✓ | ✓ | ✓ | ✓ | ✕ |
| Multi-state filing & remittance | ✓ | ✓ | ✓ | ✓ | ✕ |
| Nexus monitoring & alerts | ✓ | ✓ | ✓ | ✓ | ✕ |
| Sales tax registration | ✓ | ✓ | ✓ | ✓ | 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 |
| Fixed-fee pricing (no hourly surprises) | ✓ | ✕ | ✓ | ✓ | ✕ |
| U.S. sales tax focus (not generalists) | ✓ | Partial | Partial | Partial | ✕ |
Ready to get started?
Free nexus check. No credit card required. Real experts if you need them.