# Detect tampered and deepfake Tax Form > A W-2, P60, or Form 16 is a payer's annual declaration of what it paid an employee and what it withheld, and a copy of that declaration sits with the tax authority. The second copy is why the form carries weight with lenders. The boxes are arithmetically bound to one another as well, since contribution figures are fixed percentages of wage figures, so editing earnings without editing withholding breaks the form. TamperCheck returns a verdict within seconds. **Canonical URL:** https://tampercheck.ai/documents-support/tax_form **API document class:** `tax_form` **Last updated:** 2026-10-07 --- ## What a genuine tax form contains A tax form of this kind is a numbered official layout, issued in a fixed revision for a fixed tax year. It names the payer, whether an employer, pension provider, or agency, with their tax identification number, and the recipient with a partly masked national identifier. The body is a set of numbered boxes rather than free text: total wages, income tax withheld, social security or national insurance wages and the contributions on them, taxable benefits, retirement deferrals, and regional entries where they apply. Boxes are bound to one another by published rules. Contribution boxes are fixed percentages of the corresponding wage boxes up to an annual ceiling, so a wage figure and its contribution figure cannot move independently. Withholding cannot exceed wages. The annual total has to equal the final year-to-date figure on the last payslip of the same year, and the payer's identification number has to match the employer named beside it. The form's revision has to be the one in use for the tax year printed on it. ## How tax form forgeries are made ### Wage box inflation The headline earnings box is raised and the contribution boxes below it are not, so the fixed percentages that link them no longer hold. It is the most common edit on this document, because a lender's affordability calculation usually reads that single box and nothing else. ### Payer identity substitution The employer name and tax identification number are replaced so earnings appear to come from a more substantial payer. Identification numbers follow a defined format in each jurisdiction, and an invented one frequently fails that format or belongs to an entity in a different sector. ### Tax year and revision mismatch A prior year's form is relabelled with the current tax year while the layout, box numbering, and revision marking stay as they were printed. Official layouts change between years, so the form itself dates the document independently of whatever year has been typed onto it. ### Blank official form completion Blank forms downloaded from the tax authority's own site are filled with invented figures. The layout is genuine because it came from the authority, and the boxes can be made to reconcile, so the giveaway lies in how the text was placed and how the file was produced rather than in the numbers. ### Duplicate layout cloning One form is copied into several, with only the recipient block changed, to supply an income history or a whole household's documents from a single source. Repeated structure at pixel level across supposedly independent forms is a strong indicator of a single origin. ### Forms generated from payroll templates Software that reproduces official layouts fills them with coherent figures, so the box arithmetic passes cleanly. These are separated from issued forms by rendering signatures, and by whether the annual figures agree with payslips and salary credits from the same period. ## What TamperCheck checks on a tax form TamperCheck runs 200+ forensic checks across three layers and returns a risk score from 0 to 100 with plain-English findings tied to specific regions of the document. These three carry the most weight on this document class. ### Arithmetic reconciliation Stated totals are recomputed from their components, and running or cumulative figures are checked for continuity across periods. A single edited value breaks the chain even when the page still looks right. ### Table structure integrity Inserted and deleted rows leave structural artifacts behind: inconsistent spacing, misaligned columns, and formatting the visible table no longer accounts for. ### Field-level forensics Every text region is analysed in its own right rather than as part of one whole-page image. This catches the smoothed and feathered edits that whole-image Error Level Analysis misses entirely. ### And many more checks The three above are the layers that carry the most weight on a tax form. Every upload runs the full suite of 200+ checks regardless of document class, spanning file structure and metadata, pixel-level forensics, font and text rendering, optical and print characteristics, provenance signals, AI-generation signatures, and many more checks. ## Who verifies a tax form, and why Lenders and employers confirming annual earnings. In each case the document is being used to unlock money, access, or a legal status, which is exactly what makes it worth forging. ## How to verify a tax form in 4 steps 1. **Check the fields against each other.** Read reported income, withholding figures, and employer identification number together rather than one at a time. Forgers typically change one value and leave the rest of the document describing the original. 2. **Inspect the file metadata.** Open the document properties and look at the producer, creation date, and modification date. A document produced by a consumer PDF editor, or created long after the date printed on its face, is worth a closer look. 3. **Ask for a second document.** Request a corroborating document from the same issuer or an adjacent period. Forgery effort concentrates on one file, so inconsistencies surface as soon as there are two to compare. 4. **Run a forensic check.** Manual review catches obvious edits but not field-level pixel manipulation or synthetic generation. TamperCheck runs 200+ forensic checks on a tax form and returns a risk score from 0 to 100 within seconds, at $0.50 per document. ## Frequently asked questions ### How do lenders verify tax forms? Lenders compare the form's annual figures against the final year-to-date column on the applicant's last payslip of that tax year, and against salary credits in the bank statement. They check that contribution boxes are the correct percentage of the wage boxes, that the payer's tax identification number matches the employer named, and that the form's printed revision belongs to the tax year it claims. ### How can you tell if a W-2 is fake? The fastest test is internal: social security and medicare boxes are fixed percentages of their wage boxes up to the annual ceiling, so check them with a calculator. Then confirm the employer identification number is correctly formatted and matches the employer named, and that the form's revision year matches the tax year. An edited wage box rarely survives all three. ### What is the difference between a W-2, a P60, and a Form 16? They are the same instrument in three jurisdictions: an annual statement from the payer of what was paid and what was withheld, given to the employee and reported to the tax authority. The United States issues a W-2, the United Kingdom a P60, and India a Form 16. All three share the property that matters for verification, which is that a second copy exists outside the applicant's control. ### Can an edited tax form be detected automatically? Yes. Changing a box amount rewrites a small region of the page, and that region carries different compression, sharpness, and font rendering from the boxes around it. TamperCheck reads the form, recomputes what the boxes owe each other, compares the layout against the official form's structure, and delivers a verdict within seconds. ## Related document types - Payslip: https://tampercheck.ai/documents-support/payslip - Salary Certificate: https://tampercheck.ai/documents-support/salary_certificate - Bank Statement: https://tampercheck.ai/documents-support/bank_statement - Tax Return: https://tampercheck.ai/documents-support/tax_return - Employment Contract: https://tampercheck.ai/documents-support/employment_contract - Offer Letter: https://tampercheck.ai/documents-support/offer_letter --- Try TamperCheck now: https://tampercheck.ai/dashboard · Docs: https://tampercheck.ai/docs · Pricing: https://tampercheck.ai/pricing