Common tax provision misstatements and audit deficiencies

• Recognize the provision errors that recur in practice
• Link each error to the ASC 740 requirement it breaks
• Identify audit documentation gaps that leave tax balances unsupported
• Evaluate return-to-provision differences for misstatement and control signals

Accounting errors that recur

Deferred balances that do not tie to basis differences. A deferred tax account rolled forward for years without being compared to actual book and tax bases drifts. Every deferred balance should map to a temporary difference or carryforward (Statement 109 paragraph 17(a)). Unsupported residuals are misstatements, not rounding.

Wrong rates. Deferred taxes measured at a blended rate that ignores current apportionment, at a rate in a bill that is not law, or at a rate that ignores a phased-in change. Paragraph 18 requires the enacted rate expected to apply when the difference reverses.

Deferred taxes on permanent differences. Tax-exempt interest or nondeductible penalties pushed into the deferred computation. These items never reverse.

Valuation allowance driven by a forecast. A company with cumulative losses supports a full deferred tax asset with projected income and no objective positive evidence, contrary to paragraphs 23 to 25. Or indefinite-lived deferred tax liabilities are used as a source without considering the 80 percent limit on post-2017 losses.

Uncertain positions. Common errors: no inventory of positions, so nothing is measured; a valuation allowance used instead of derecognition (Interpretation 48 paragraph 11); no interest accrual; the liability netted against deferred taxes (paragraph 17).

Interim mistakes. Discrete items spread through the annual effective rate, or the rate not updated when the forecast changed.

Intraperiod and equity items. A benefit allocated to a continuing operations loss because of an OCI gain, which ASU 2019-12 eliminated.

Disclosure. Rate reconciliations that do not foot, categories that do not match ASU 2023-09, taxes paid derived from expense, and carryforward expiration dates missing.

Audit documentation gaps

The accounting errors above survive because of file gaps such as:

• No retrospective review. AU-C 540 requires the auditor to review outcomes of prior estimates. The return-to-provision true-up is that review for taxes, and a file that books the true-up without analyzing it misses the signal.
• Specialist work not evaluated. A tax specialist's memo filed without evidence that the auditor evaluated the assumptions, methods and source data under AU-C 620.
• Reliance on an outside opinion alone. AU-C 9500 says counsel's opinion does not, by itself, provide sufficient appropriate evidence.
• Management intent not tested. Tax-planning strategies and indefinite reinvestment accepted without evaluating management's intent and ability under AU-C 540.
• Provision built by the audit team. If the auditor prepares the provision, the client's process has a gap that may be a significant deficiency or material weakness, and independence must be evaluated.

Control signals

A large unexplained return-to-provision adjustment or a late-posted tax entry points to weak review controls over the provision. Evaluate whether it is a deficiency and communicate it under AU-C 265. The deficiency evaluation worksheet helps with severity.

A short checklist

1. Each deferred balance ties to a basis difference or carryforward schedule.
2. Rates are enacted and match each jurisdiction's expected apportionment.
3. The valuation allowance memo addresses cumulative results and all four sources.
4. An uncertain position inventory exists, with measurement and interest.
5. The return-to-provision true-up is analyzed by line and fed into this year's estimates.
6. Discrete items in each quarter are listed and excluded from the annual rate.
7. Every number in the note ties to the provision workpapers.

For the earlier lessons in this track, start with current and deferred tax.

Return-to-provision analysis at Oakmont Precision Parts, Inc.