Intelligent Tax Technology, Built Around You
Empowering organizations with intelligent, scalable, and compliant tax technology solutions.
Strategy
Roadmap design
Planning
Project management
Implementation
Design, build/configuration, test and train
Integration
Connect your business systems
Tax Engine
Vertex and Avalara expertise
Withholding Tax
Resolve over- and underpayments
Chicago-Based. Globally Supported.
A Chicago-based firm with an offshore back-office team across the EU, APAC, and the Middle East.
End-to-End Tax Automation Solutions
We specialize in the design, build, testing, training, and ongoing support of enterprise-level tax automation solutions. Our approach ensures accuracy, compliance, scalability, and seamless system integration.
Sales & Use Tax
End-to-end implementation and configuration of sales and use tax solutions, ensuring accurate calculation and compliance across all jurisdictions.
GST, HST, PST & VAT
Global indirect tax solutions covering GST, HST, PST, and VAT — configured for multi-jurisdictional compliance and reporting requirements.
Withholding Tax
Overpaid or underpaid withholding taxes due to gaps in tax technology — such as, inconsistent master data, or disconnected ERP processes
Tax Technology Assessment
Evaluate your tax technology landscape, identify process and data gaps, and prioritize a practical roadmap for automation, compliance, and growth.
E-Invoicing
Design and implement compliant e-invoicing processes that connect tax requirements, business systems, and real-time reporting across jurisdictions.
Transfer Pricing
Support transfer pricing data, calculations, and documentation processes with connected systems that improve consistency, transparency, and compliance.
Fixed Assets
Improve fixed asset tax treatment with accurate classifications, depreciation processes, and reporting that align tax requirements with your ERP data.
Tax AI Models
Design and build tax agents tailored to your business processes, built for accuracy, scalability, and seamless integration with existing solutions.
Certified. Proven. Trusted.
Our team holds industry-recognized certifications on the leading tax engine platforms.
Platforms We Support
Deep expertise across the world's leading ERP platforms — delivering native tax configurations and integrations that work.
Workday
- Tax configurations and implementations
- Sales and Use Tax
- Consumer Use Tax
- Tax Reporting
Microsoft Dynamics 365
- VAT
- Sales and Use Tax
- Consumer Use Tax
- Tax Reporting
NetSuite
- Sales and Use Tax
- Consumer Use Tax
- Tax Reporting
Custom API Build
- Tax engine integrations
- ERP and e-commerce connections
- Secure data exchange
- Monitoring and support
SAP
- Tax configurations and implementations
- Sales and Use Tax
- VAT and e-invoicing
- Tax reporting
Salesforce
- Tax-ready CRM and billing workflows
- Sales and Use Tax integrations
- E-invoicing and transaction data
- Tax reporting and compliance support
Connect with S1STEX Specialist
Fill out this short form to get started. Once you submit, you can expect the following:
- ✓ We'll review your business and tax technology needs
- ✓ One of our specialists will contact you to discuss tailored solutions
- ✓ You'll receive insights on how S1STEX can streamline and optimize your tax technology landscape
Connect with us now — we're excited to speak with you!