Position Summary The U.S. Sales Tax Specialist and Administrative Support is responsible for managing and supporting all aspects of U.S. sales and tax compliance across multiple states and jurisdictions and for providing administrative support to the Legal Department and Product Development team. This role ensures that the company accurately calculates, collects, reports, and remits sales and use taxes in accordance with applicable federal, state, and local requirements.

The successful candidate will monitor changes in U.S. sales tax legislation, assess sales tax obligations and nexus requirements, support tax audits, assist the Legal Department and Product Development team with administrative filings and related matters, and work closely with the Head of Tax, Finance, Accounting, Legal, Operations, and external tax advisors.

Qualifications and Education Requirements

- Bachelor’s degree in Accounting, Finance, Taxation, Business, or a related field.
- 3–5+ years of experience in U.S. sales and use tax, preferably in a multi-state environment.

Duties and Responsibilities

- Manage U.S. sales and use tax compliance across multiple states and local jurisdictions.
- Prepare, review, and file periodic sales and use tax returns accurately and on a timely basis.
- Calculate and reconcile sales tax liabilities, payments, and tax accounts.
- Monitor physical and economic nexus requirements and determine state registration obligations.
- Maintain accurate sales tax registrations, permits, exemption certificates, and related documentation.
- Research and interpret state and local sales tax laws,



regulations, and administrative guidance.
- Monitor legislative and regulatory changes affecting U.S. sales and use tax.
- Review sales transactions to ensure the appropriate sales tax treatment is applied based on customer location, product/service type, and applicable exemptions.
- Maintain and validate customer exemption and resale certificates.
- Support sales tax audits, notices, assessments, and inquiries from state and local tax authorities.
- Assist with voluntary disclosure agreements, registrations, and remediation projects when required.
- Reconcile sales tax reports from ERP, accounting, e-commerce, and tax automation systems.
- Identify and resolve sales tax discrepancies and compliance issues.
- Collaborate with Accounting, Finance, Sales, Legal, IT, and Operations teams to ensure proper sales tax processes.
- Assist with the implementation and maintenance of sales tax automation systems.
- Support tax process improvements, internal controls, and documentation.
- Maintain organized records to support sales tax filings, audits, and compliance requirements.
- Support the Head of Tax in the coordination with external tax advisors and state tax authorities if needed.




- Provide sales tax guidance to internal stakeholders regarding new products, customers, contracts, and business activities.
- Assist the Legal Department and Product Development team with administrative filings and related matters.

Required Skills and Abilities

- Strong knowledge of U.S. state and local sales and use tax rules.
- Understanding of sales tax nexus, economic nexus, exemptions, resale certificates, and taxability rules.
- Experience preparing and filing multi-state sales tax returns.
- Experience supporting sales tax audits and state tax authority inquiries.
- Strong analytical, research, and problem-solving skills.
- Excellent attention to detail and ability to manage multiple deadlines.
- Strong Excel skills and experience working with ERP or accounting systems.
- Excellent written and verbal communication skills.
- Ability to provide administrative support to the Legal Department and Product Development team, including assistance with administrative filings and related matters that do not require legal or product development technical expertise.

Key Competencies

- U.S. Sales & Use Tax Compliance
- Multi-State Taxation
- Economic & Physical Nexus
- Sales Tax Research
- Tax Audit Support
- Tax Return Preparation
- Tax Reconciliation
- Exemption Certificate Management
- Tax Automation is an asset
- Regulatory Monitoring
- Excel & Data Analysis
- Attention to Detail
- Project Management
- Communication & Stakeholder Management
- Legal & Product Development Administrative Support

📌 U.S. Sales Tax Specialist & Administrative Support (Santiago de Querétaro)
🏢 South Mill Champs Mushrooms
📍 Santiago de Querétaro