Thomson Reuters ONESOURCE Corporate Tax Reporting Training Course

Course overview

Corporate tax reporting teams must convert ledger data, trial balances, tax adjustments and jurisdictional information into a defensible current and deferred tax provision under demanding close timetables. When spreadsheets, emailed workpapers and manually maintained assumptions sit outside the reporting system, reviewers struggle to trace changes, validate effective tax rate movements and confirm that the tax footnote agrees to the provision. This course equips practitioners to use Thomson Reuters ONESOURCE Corporate Tax Reporting workflows to build a controlled, review-ready tax reporting process.

Participants learn how to configure and navigate ONESOURCE Tax Provision workspaces; load, map and validate source data; manage permanent and temporary differences; calculate current tax, deferred tax and valuation allowances; and analyse rate reconciliation and return-to-provision adjustments. The course applies ASC 740 concepts throughout, while identifying where IAS 12 requirements affect data, calculations and disclosures. Participants also practise using workpapers, task lists, diagnostics, review statuses and audit trails to make close activities visible and repeatable.

Instruction combines guided system demonstrations with hands-on work in a configured training environment. Each participant completes a progressive corporate tax reporting case, from entity setup and trial balance import through provision calculation, review and reporting output. They leave with a completed provision-case workbook, a documented close workflow, a control checklist and an action plan for applying ONESOURCE practices to their own reporting cycle.

The course is suited to tax accountants and finance professionals moving into provision work, as well as experienced corporate tax staff seeking a more structured way to use ONESOURCE during quarterly and annual close.

Course objectives

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

• Configure an ONESOURCE Tax Provision reporting workspace using entities, periods, jurisdictions and account mapping rules
• Import and validate trial balance data using source-data checks, mapping diagnostics and exception reports
• Calculate current tax expense and payable positions from book-to-tax adjustments and jurisdictional tax rates
• Build deferred tax calculations for temporary differences, tax losses, credits and enacted rate changes
• Assess valuation allowance positions using recoverability evidence and documented judgement criteria
• Produce effective tax rate reconciliations and investigate material rate drivers through provision analytics
• Prepare return-to-provision adjustments and document their impact on current and deferred tax balances
• Create a review-ready close package containing workpapers, approvals, audit-trail evidence and reporting outputs

Benefits of attending

Target competencies

Who should attend

• Corporate Tax Accountants — who prepare current and deferred tax calculations during monthly, quarterly or annual close
• Tax Provision Analysts — who need to load data, maintain adjustments and explain effective tax rate movements
• Tax Managers — who review provision outputs and need stronger workflow, evidence and close controls
• Financial Reporting Accountants — who reconcile tax provision balances to financial statements and tax disclosures
• Group Tax Reporting Specialists — who coordinate entity-level tax data across multiple jurisdictions
• Finance Systems Analysts — who support tax data interfaces, mapping and reporting-system controls

Requirements and prerequisites

Participants should understand the purpose of a corporate income tax provision and be comfortable reading a trial balance, journal entries and basic financial statements. Familiarity with current tax, deferred tax, temporary differences and the effective tax rate is helpful, but the course explains these concepts before applying them in ONESOURCE. Participants should be able to work confidently in Microsoft Excel and navigate browser-based business applications. Prior use of Thomson Reuters ONESOURCE is not required, and no programming, database administration or prior tax software configuration experience is assumed. Complete beginners should expect a demanding introduction to provision terminology alongside guided system practice.

Training methodology

The five-day programme uses instructor-led explanation of tax reporting concepts followed immediately by guided work in Thomson Reuters ONESOURCE Tax Provision. Participants work through a multi-entity corporate case, importing a trial balance, mapping accounts, posting tax adjustments, calculating current and deferred tax, and resolving validation exceptions. Short case discussions focus on judgement areas such as valuation allowances and rate changes. Peer review exercises test the quality of workpapers and reviewer evidence. On the final day, participants convert the case into an application plan, identifying their own close-cycle data, controls and reporting priorities.

Course outline

Day 1: Provision reporting foundations and ONESOURCE navigation

• Corporate tax provision lifecycle from close calendar to financial statement reporting
• ASC 740 current tax and deferred tax fundamentals
• IAS 12 comparison points for multinational reporting teams
• ONESOURCE Tax Provision workspace navigation and security roles
• Entity, jurisdiction, period and currency configuration
• Chart of accounts and tax-sensitive account mapping principles
• Provision workflow statuses, task lists and reviewer responsibilities

Workshop: Participants configure a multi-entity training case, establish reporting periods and create an initial close-task workflow for preparers and reviewers.

Day 2: Data collection, mapping and validation

• Trial balance source requirements and import-file preparation
• ONESOURCE data import routines and template controls
• Account mapping rules for book, tax and provision reporting
• DataFlow concepts for repeatable tax data collection
• Validation diagnostics for unmapped accounts and balancing exceptions
• Foreign currency translation considerations in tax reporting data
• Source-data reconciliation to the general ledger and consolidation ledger

Workshop: Participants import a trial balance, resolve mapping exceptions and produce a documented reconciliation between source balances and the provision dataset.

Day 3: Current tax, deferred tax and valuation allowances

• Current tax expense, tax payable and instalment balance calculations
• Permanent differences and book-to-tax adjustment treatment
• Temporary difference identification and deferred tax account classification
• Tax loss carryforwards and tax credit tracking
• Enacted tax rate selection and rate-change remeasurement
• Valuation allowance assessment and recoverability evidence
• Deferred tax journal entry support and balance sheet presentation

Workshop: Participants calculate current and deferred tax for the case entities, document a valuation allowance conclusion and prepare supporting journal-entry schedules.

Day 4: Analysis, reporting and provision review

• Effective tax rate reconciliation structure and rate-driver analysis
• Cash tax forecasting inputs and payable movement analysis
• Return-to-provision adjustment identification and posting
• ONESOURCE Workpapers organisation and linked supporting schedules
• Review notes, sign-off statuses and evidence retention
• Audit-trail analysis for changed assumptions and tax adjustments
• Tax provision reporting outputs for finance and external auditors

Workshop: Participants investigate an unexpected effective tax rate movement, prepare a return-to-provision adjustment and assemble a reviewer-ready workpaper package.

Day 5: Controlled close execution and workplace application

• End-to-end quarterly close sequencing in ONESOURCE
• Control points for data completeness, calculation review and approval
• Segregation of duties and role-based access considerations
• Exception management and escalation during compressed close timetables
• Standardising entity submissions and close checklists
• Communicating provision results to controllership and audit stakeholders
• Implementation planning for an organisation-specific ONESOURCE workflow

Workshop: Participants complete the end-to-end case close and produce a 90-day application plan with proposed data controls, workflow roles and reporting improvements.

Tools & standards covered

Thomson Reuters ONESOURCE Tax Provision, Thomson Reuters ONESOURCE Workpapers, Microsoft Excel, ASC 740

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