Sorai Sorai Decision-Grade Review

Tax DD

Automated Tax Due Diligence

Tax due diligence software needs to connect returns, apportionment, nexus indicators, and tax attributes to the live deal record. Sorai gives tax teams an automated workspace for NOL review, Section 382 screening, SALT analysis, and deferred tax assessment so exposure stays visible while the transaction is still moving.

Expert byline

Sorai Editorial

Reviewed by Sorai's tax diligence workflow team

NOL, SALT, and deferred tax review design

Built for transaction tax workflows Evidence-linked nexus and attribute review Cross-workstream visibility into tax-driven deal risk
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Quick answer

Tax due diligence is the process of identifying historical tax exposure, testing tax attributes, and evaluating transaction-specific tax risk before a deal closes. Sorai gives teams tax due diligence software that automates NOL, SALT, and deferred tax review while preserving the supporting logic behind every finding.

automated checks

18+

Run structured checks across returns, nexus, tax attributes, deferred positions, and historical filing patterns.

screening

382

Review ownership change implications and whether NOL value could be materially limited after closing.

analysis

SALT

Map nexus indicators, filing gaps, and state exposure without isolating tax from the broader deal workflow.

Definition

What is an NOL limitation?

An NOL limitation is the annual ceiling on how much of a target's historic net operating losses can be used after ownership changes. In acquisitions, Section 382 is the main U.S. rule that can reduce the practical value of those tax attributes.

Core sections

Decision-grade coverage for the full workstream.

Section 01

What is tax due diligence

Tax due diligence reviews the target's historical tax profile and the transaction's likely tax consequences before closing. Buyers need to know where there may be unpaid exposure, whether tax attributes are usable, how structure choices change outcomes, and which issues should influence price, indemnities, or purchase agreement drafting.

The challenge is that tax risk often sits across returns, workpapers, registrations, payroll data, financial statements, and side explanations from management. Sorai is designed to make that review more structured by turning those inputs into a connected system of checks, findings, and reviewer decisions.

  • Surface historical exposure before it becomes a late-stage indemnity debate
  • Evaluate tax attributes and whether they survive the transaction intact
  • Connect tax conclusions to deal structure, SPA terms, and financial diligence findings

Section 02

18+ automated tax checks overview

Sorai organizes tax due diligence around a repeatable set of checks so analysts can move faster without flattening the work into a generic checklist. The platform can flag missing returns, inconsistent state filings, tax attribute questions, uncertain deferred balances, and other issues that deserve deeper technical review.

That operating model helps tax diligence scale because each check can produce a finding, supporting evidence, reviewer comments, and a status. Instead of summarizing everything at the end, the work is already structured while the deal team is still making decisions.

  • Return coverage and filing gap checks across federal, state, and local jurisdictions
  • NOL, credit, and other tax attribute review
  • Section 382 change-of-ownership screening
  • SALT nexus and apportionment risk indicators
  • Deferred tax asset and liability reconciliation
  • Transaction structure implications that need escalation

Section 03

NOL & Section 382 module

Net operating losses can look valuable in a deal model, but their real value depends on whether they remain usable after an ownership change. Sorai's NOL and Section 382 workflow is built to organize attribute history, ownership change indicators, and supporting calculations so teams can quantify the practical downside before they underwrite the value.

The point is not to replace tax judgment. It is to make sure that the relevant returns, schedules, and review notes stay attached to the conclusion. When the sponsor asks how much of the tax shield is real, the answer should already be supported and traceable.

  • Track federal and state NOL balances with source-linked documentation
  • Flag ownership change patterns that may trigger limitation analysis
  • Separate headline tax attributes from economically usable tax attributes

Section 04

SALT nexus analysis

State and local tax exposure is one of the fastest ways for tax diligence to become commercially relevant. A target can create nexus through sales, payroll, remote employees, property, or operational activity long before management has a clean filing posture in every state where exposure exists.

Sorai helps teams gather those signals and keep them tied to the broader deal record. If a SALT issue is likely to affect purchase price, escrow, or remediation cost, the financial and legal teams can see that context instead of waiting for a separate memo to land late in the process.

  • Map nexus indicators by state and legal entity
  • Record filing history gaps and open registration questions
  • Escalate states that may require voluntary disclosure or indemnity coverage

Section 05

Deferred tax review

Deferred tax balances often expose disconnects between the financial statements and the tax filing position. Sorai's deferred tax review workflow lets teams reconcile book and tax differences, challenge unsupported balances, and document where deferred assets may not be realizable under the buyer's ownership model.

That matters because deferred items can influence purchase accounting, tax sharing assumptions, and post-close economics. A clean diligence process should show not just the number, but why the number is reliable and what assumptions it depends on.

  • Reconcile book-tax timing differences to returns and supporting schedules
  • Document valuation allowance logic and realizability questions
  • Connect deferred findings to structure and purchase accounting implications

Section 06

Integration with FDD module

Tax findings rarely live in isolation. A nexus issue may change the quality of earnings view, a structure decision may alter deferred tax balances, and a tax attribute conclusion may affect the buyer's model. Sorai keeps those dependencies visible by letting tax work connect directly to the financial diligence record.

This is where tax due diligence software becomes materially more useful than a document repository. The system does not only store returns. It helps the deal team understand which tax findings change the economics of the transaction and where follow-up belongs next.

  • Share exposure and structure implications with the FDD workstream
  • Tie tax findings to purchase agreement economics and negotiation points
  • Carry the tax record forward into later committee and execution materials

Section 07

Why Sorai vs manual tax memo process

Traditional tax diligence often ends with a technically sound memo that arrives after the commercial discussion has already moved on. Sorai improves that operating model by making the tax record readable while the work is live, not only after the memo is drafted. That gives sponsors, legal teams, and financial reviewers a clearer sense of which tax issues are already material.

The result is a cleaner escalation path. Instead of re-translating tax findings for each audience, Sorai preserves the issue, the supporting return data, the reviewer judgment, and the commercial implication in one workflow that can travel with the deal.

  • Reduce memo-only visibility into live tax issues
  • Keep technical findings tied to commercial impact and owner context
  • Improve handoff from tax review into negotiation and execution planning

Frequently asked questions

What does tax due diligence software automate first?

It automates the structure of the review: organizing returns, running repeatable checks, surfacing likely exposures, and preserving reviewer decisions so tax findings stay connected to the live deal process.

Why does Section 382 matter in M&A?

Section 382 can limit how much of a target's historic NOLs a buyer may use after a change in ownership, which means the modeled tax asset may be worth less than management expects.

How does Sorai help with SALT analysis in M&A?

Sorai organizes nexus indicators, filing histories, apportionment signals, and reviewer notes into one workflow so SALT exposure can be assessed early and shared with the rest of the deal team.

Connected pages

Follow the internal path into the rest of the hub.

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