Editorial Policy

Every page on TranscriptCodes is written for a U.S. audience and checked against primary sources — IRS.gov, IRS notices, Revenue Rulings and the Internal Revenue Manual.

How we write

• Plain English first: what it means, why it happened, what to do.
• Every calculator shows its formula and uses the latest official figures, which you can edit.
• Each page shows the date it was last reviewed. We re-check figures when the IRS announces new rates each quarter and year.

Corrections

Found an error? Contact us — we fix confirmed errors and update the review date.

Independence

We are not affiliated with the IRS or any government agency. Ads never influence our explanations.