Founded by former Deloitte and EY professionals, we bring Big Four caliber expertise with the agility and focus of a specialist firm. We configure tax engines, integrate ERP systems, build Tax AI models, and stay accountable for results.

What we do:
→ Tax Engine Implementation — Full lifecycle deployment across Vertex and Avalara
→ ERP Tax Configuration — Tax determination setup within SAP S/4HANA, Workday, NetSuite, Salesforce, API and Microsoft Dynamics
→ Tax AI Model Development — ML models for tax rate prediction, exemption certificate validation, audit risk scoring, and compliance anomaly detection
→ Customer Tax Reporting — Automated reporting, filing workflows, and compliance dashboards for tax leadership
→ Managed Services — Ongoing optimization and proactive monitoring of your tax technology stack

We operate across the US, Canada, EU, Asia Pacific, and the Middle East through an onshore + offshore delivery model that pairs senior domain expertise with scalable execution.

Our clients include organizations in healthcare, manufacturing, retail, wholesale, apparel, supply chain, and rare earth minerals navigating complex multi-jurisdictional tax obligations.

AI is transforming how tax work gets done. We believe that efficiency should benefit clients — not just pad consulting margins. Every engagement we deliver is built around that principle.

📩 Start with a complimentary Tax Technology Health Check — a 2–4 week diagnostic of your current tax stack that identifies risks, gaps, and optimization opportunities.

https://www.s1stex.com

S1STEX

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S1STEX

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