Corporate Tax Backup

Streamline Your Tax Season. Eliminate Bottlenecks. Deliver Audit-Ready Returns. The success and speed of any corporate tax filing depend on the quality of the underlying workpapers. Yet every tax season, CPA firms and in-house corporate tax teams waste hundreds of high-value billable hours sifting through messy client data, unorganized PDFs, and raw trial balances.

At OBG Outsourcing Private Limited, we act as your specialized backend engine. We turn chaotic financial records into standardized, fully referenced, and audit-ready tax workpapers. By letting our tax preparation specialists do the heavy groundwork, your team can focus on high-margin strategic advisory, tax planning, and client relationships.

Our Core Workpaper Support Solutions

We customize and structure every tax workpaper binder to align strictly with your firm’s proprietary templates, software preferences, and quality control standards.

1. Source Document Indexing & Bookmarking

We organize raw client records—including W-2s, 1099s, K-1s, bank statements, asset purchase orders, and loan agreements—into a single, OCR-searchable PDF binder with standardized bookmarking for instant navigation.

2. Trial Balance & Lead Schedule Assembly

Our specialists clean up client trial balances and map every account to its designated lead schedule, establishing a seamless link between general ledger items and specific tax form lines.

3. Book-to-Tax Reconciliation (Schedule M-1 / M-3)

We systematically identify, calculate, and document all permanent and timing differences, including:

Meals and entertainment limitations

Tax vs. book depreciation adjustments (Section 179 / Bonus Depreciation)

Executive compensation and accrual-to-cash conversions

Interest expense limitations and officer life insurance

4. Account Analysis & Schedule Substantiation

We build detailed supporting schedules for high-scrutiny balance sheet and income statement items:

Fixed Assets: Capitalization vs. expense analysis and fixed asset roll-forwards.

Intercompany Transactions & Loans: Reconciliation of related-party balances and transfer pricing documentation support.

Prepaid Expenses & Accruals: Verification of timing and tax deductibility.

5. Tick-Marking & Cross-Referencing

We enforce strict workpaper standards by embedding hyperlink cross-references and standardized tick-marks across source documents, lead schedules, and tax software draft inputs—creating a clear, traceable audit trail.

Why Leading CPA Firms & Enterprises Partner with OBG

Software We Support

Our team works fluently across major tax, accounting, and workpaper preparation platforms:

Tax & Workpaper Engines: CCH ProSystem fx / Axcess, UltraTax CS, Drake, Thomson Reuters Checkpoint, Engagement CS, SurePrep.

Core Accounting Systems: QuickBooks Online/Desktop, Xero, NetSuite, Sage, Zoho Books.

How Our Workpaper Process Works

Secure Data Transfer Upload raw client records, GL data, and prior-year returns to our ISO-certified cloud platform.     
Indexing & Mapping OBG specialists index files, reconcile the trial balance, and map accounts to tax lead schedules.
Reconciliation & Substantiation We calculate M-1/M-3 differences, build supporting workpapers, and cross-reference all items.
Quality Control & Review A senior tax manager performs a peer review to ensure 100% accuracy and audit readiness.      
Final Delivery Receive a complete, indexed, and tick-marked workpaper binder ready for final return sign-off.

Ready to Scale Your Corporate Tax Practice?

Partner with OBG Outsourcing Private Limited to build a bulletproof workpaper foundation, eliminate tax season burnout, and double your capacity.