U.S. tax due diligence and quality of earnings before an acquisition or fundraise

Quality of earnings asks whether profit is repeatable; tax due diligence asks what was filed, what remains open and who bears responsibility after closing. They share data but do not replace one another.

1. Define the transaction, scope and reliance first

A fundraise, minority investment, stock acquisition, asset acquisition and merger create different tax questions. The scope should identify entities, ownership, expected transaction date, structure, states and historical periods, and distinguish a red-flag, full-scope or agreed-procedures report. “Tax clean” is not a testable scope.

Data access also needs authority. Form 8821 can permit access to listed tax information but not representation; Form 2848 authorizes an eligible representative. IRS transcripts and compliance reports supplement returns and notices but do not replace the ledger, state accounts and transaction testing.

• Transaction type and expected closing
• Legal entities, classifications and ownership
• Periods, taxes and states
• Data access and authorization
• Red-flag, full-scope and report users

2. Build an evidence chain from returns to the ledger

Federal and state income or franchise returns, international forms, Payroll, Sales Tax, Forms 1099, property tax and annual reports belong in a filing matrix. Reconcile extension, acceptance, payment, notice and open audit, then bridge reported revenue, wages, liabilities and apportionment to ledgers and subledgers.

Risk often sits in unfiled states, the wrong legal entity, contractor history, marketplace deductions, unsupported certificates, related-party fees or missing international schedules—not just tax payable. The exposure register should identify facts, possible periods, estimate method, interest and penalty treatment, remediation and confidence.

• Filing matrix and submission evidence
• Return-to-ledger reconciliation
• Open notices, audits and payments
• Nexus and unfiled periods
• Exposure, remediation and confidence

3. QoE and tax intersect in revenue, Payroll and working capital

QoE normalizes one-time, nonrecurring, owner-related and cut-off items; tax diligence asks whether they change taxable income, Payroll, Sales Tax or information reporting. Net platform cash recorded as revenue, missing returns, gift-card liabilities, inventory cut-off and related-party charges can affect both EBITDA quality and tax.

Do not accept working-capital tax accounts at book value without testing. Sales Tax payable, Payroll tax, income-tax receivable, duties and unclaimed property can contain overdue or wrong-state balances. Classify normalized earnings, debt-like items and tax exposures so one issue is not counted twice in price and indemnity.

• Gross-to-net revenue and cut-off
• Refunds, gift cards and deferred revenue
• Payroll, bonus and contractors
• Inventory, COGS and landed cost
• Tax balances and debt-like items

4. Deal structure changes historical responsibility and basis

Asset and stock acquisitions differ in basis, historical liability and returns. Qualifying asset transfers generally require buyer and seller to report purchase-price allocation on Form 8594. Some qualified stock purchases may consider a Section 338 election, with a strict Form 8023 deadline. State, transfer-tax and consent issues also matter.

Payroll predecessor-successor rules, acquisition-quarter Form 941 and Schedule D belong in the day-one plan. Structure cannot wait until the final week because the purchase agreement, valuation, financing, legal steps and accounting need the same allocation and effective date.

• Asset, stock or deemed-asset deal
• Form 8594 allocation
• Section 338 and Form 8023 timing
• State, transfer and indirect taxes
• Payroll predecessor-successor setup

5. Translate findings into documents and Day One

Each material finding needs a treatment: pre-close correction, price adjustment, specific indemnity, escrow, tax covenant, information delivery or post-close filing. Separate known liability, range and unquantified risk and disclose assumptions; a generic risk label does not support a decision.

Build a Day-One calendar for account control, pre-close records, old notices, short-period and final returns, state accounts and Payroll conversion. A fundraise can use the same process to clean the data room and control gaps, improving readiness without promising a valuation or financing result.