Vertex O Series Indirect Tax Automation Training Course

Course overview

Indirect tax errors often originate upstream: incomplete ship-to data, incorrect product taxability, customer exemption handling, or an ERP-to-tax-engine mapping that does not reflect the commercial transaction. Vertex O Series users need to translate tax policy into operational rules, validate tax calculations before invoices are issued, and explain exceptions to finance, IT, and business teams. This course addresses the practical work of configuring, testing, monitoring, and improving indirect tax determination in Vertex O Series across sales, purchasing, and cross-border transaction scenarios.

Participants work through the Vertex O Series transaction lifecycle, from ERP source data and jurisdiction determination to taxability drivers, product and customer exemptions, rule maintenance, and calculation review. They learn how to analyse transaction logs, diagnose unexpected tax results, use tax area and jurisdiction data, manage exemption certificates, prepare controlled configuration changes, and test integrations using realistic transaction payloads. The course also covers governance practices for tax content updates, rate and rule changes, reconciliation, and audit-ready evidence.

Delivery combines instructor demonstrations in a Vertex O Series training environment with guided configuration labs, transaction-testing workshops, and tax exception case studies. Participants build a documented indirect tax automation pack containing a transaction data map, taxability decision matrix, test script set, exception-triage workflow, and a 90-day improvement plan for their own environment. The course is suited to tax and finance professionals who must own tax accuracy while working closely with ERP, integration, and master-data teams.

Course objectives

By the end of this course, participants will be able to:

• Map ERP order-to-cash and procure-to-pay fields to Vertex O Series tax drivers and transaction inputs
• Configure taxability treatments using product, customer, usage, and jurisdiction-based decision logic
• Validate jurisdiction determination and tax area assignment for domestic and cross-border transactions
• Analyse Vertex O Series transaction logs to identify the source of unexpected tax calculations
• Apply exemption certificate and customer exemption controls to support compliant tax treatment
• Create repeatable test scripts and expected-result matrices for tax configuration and integration changes
• Reconcile calculated tax exceptions against ERP invoices, credit memos, and tax reporting extracts
• Produce a governed change-control and exception-triage workflow for an indirect tax automation environment

Benefits of attending

Target competencies

Who should attend

• Indirect Tax Managers — who own tax determination policy, compliance controls, and tax-engine performance
• Tax Technology Managers — who translate tax requirements into Vertex O Series configurations and integration specifications
• Sales and Use Tax Analysts — who investigate calculation exceptions and maintain taxability treatments
• ERP Functional Consultants — who map transaction data from SAP or Oracle processes into the tax engine
• Finance Systems Analysts — who support invoice, credit memo, procurement, and tax reconciliation workflows
• Internal Audit and Tax Control Specialists — who assess evidence, change governance, and indirect tax control effectiveness

Requirements and prerequisites

Participants should understand the basic purpose of sales tax, use tax, VAT or GST, including taxability, nexus or registration concepts, exemptions, taxable basis, and invoice-level tax calculation. Experience reviewing ERP transactions in SAP S/4HANA, Oracle Fusion Cloud ERP, or a comparable finance system is helpful. Attendees should be comfortable reading transaction fields in a spreadsheet and discussing master data with IT teams. Prior Vertex O Series administration experience is not required, and coding, API development, or advanced tax return preparation are not assumed. This is an intermediate course, so it does not teach foundational indirect tax law from first principles.

Training methodology

The instructor uses a Vertex O Series training environment to demonstrate configuration choices and then assigns participants realistic order, invoice, credit memo, purchase, and exemption scenarios. Guided labs require participants to inspect transaction inputs, configure taxability treatments, run calculations, and compare actual results with expected outcomes. Small groups investigate deliberately flawed ERP-to-tax-engine mappings and present their root-cause findings. Each day closes with a practical artefact, culminating in an individual application plan that identifies the highest-priority controls, tests, and data fixes for the participant’s own tax process.

Course outline

Day 1: Vertex O Series transaction foundations

• Vertex O Series architecture and indirect tax calculation flow
• Order-to-cash and procure-to-pay transaction lifecycles
• ERP source fields, tax drivers, and transaction payload structure
• Company, division, registration, and ship-from location data
• Ship-to, bill-to, point-of-order-acceptance, and destination sourcing concepts
• Tax area and jurisdiction hierarchy interpretation
• Transaction inquiry screens and calculation result components

Workshop: Participants map a sample ERP sales invoice into a Vertex O Series transaction data map and identify the fields that control its tax result.

Day 2: Taxability and exemption configuration

• Product class and product taxability classification methods
• Customer class, customer exemption, and entity-use treatment
• Usage-based taxability and exemption decision logic
• Taxability drivers for tangible goods, services, freight, and bundled charges
• Tax basis, discounts, fees, and surcharge treatment
• Exemption certificate data and validation control points
• Configuration documentation and approval requirements

Workshop: Participants build a taxability decision matrix for a product catalogue with exempt customers, taxable services, freight, and mixed-use transactions.

Day 3: Integration testing and tax result diagnosis

• SAP S/4HANA and Oracle Fusion Cloud ERP integration patterns
• Request and response field mapping for tax calculation calls
• Transaction log filtering, drill-down, and root-cause analysis
• Expected-result design for positive, negative, and boundary test cases
• Credit memo, return, cancellation, and invoice adjustment testing
• Address quality, location master data, and jurisdiction mismatch diagnosis
• Postman-based inspection of tax calculation API payloads

Workshop: Participants investigate a set of failed tax calculations, isolate the data or configuration defect, and produce a corrected test case with expected results.

Day 4: Controls, reconciliation, and operational governance

• Tax content update assessment and release-impact analysis
• Rule-change request intake, approval, and segregation of duties
• Exception queues and severity-based issue triage
• Invoice-to-tax-engine reconciliation methods
• Variance analysis for tax amount, jurisdiction, and taxability differences
• Evidence retention for audit and indirect tax controversy support
• Operational dashboards for exception volume and recurring defects

Workshop: Participants design an exception-triage workflow and reconciliation checklist for a month-end review of Vertex O Series tax results.

Day 5: Applying Vertex O Series to business scenarios

• Multi-entity and multi-registration operating models
• Cross-border transaction data requirements and indirect tax considerations
• Marketplace, drop-shipment, and customer pickup scenarios
• Procurement use-tax decision points and vendor tax variance review
• Configuration migration and regression-test planning
• Tax, IT, and master-data ownership model design
• Ninety-day indirect tax automation improvement roadmap

Workshop: Participants complete a capstone case by producing a documented configuration recommendation, test pack, control workflow, and 90-day improvement plan.

Tools & standards covered

Vertex O Series, SAP S/4HANA, Oracle Fusion Cloud ERP, Postman

A typical training day

Live online deliveries follow the same structure in the East Africa Time zone, with shorter screen blocks and longer breaks.

What the fee includes

How you can take this course

Certification

Participants who complete the full five days receive the Skillset Development Certificate of Completion, stating the course title, course code, dates and delivery format — suitable for professional-development records and employer reimbursement.

Frequently asked questions