Does your tax software recognize new W-2 box codes for 2027?

 

Every year, workers get a W-2, the form that reports how much they earned and how much tax came out of their paycheck. Most years, the form barely changes. This year is different. The 2026 Form W-2, which employers hand out in January 2027, adds fields that didn’t exist twelve months ago. If your tax software, or the AI sitting on top of it, was trained on last year’s return, it has never seen these new tax fields. 

Here’s what changed, why it trips up AI tools that guess from prior-year returns, and what to ask before trusting an AI-prepared return this filing season. 

 

Jump to ↓

What’s new on the 2026 Form W-2

---

2025 was a grace year for tax preparers. 2026 isn’t.

---

Why these new W-2 box codes are a real problem for AI tax tools

---

Why Thomson Reuters Ready to Review handles AI tax preparation differently

---

Here’s the real question to ask for the 2027 tax season

 

What’s new on the 2026 Form W-2 

Three new codes join Box 12, and a new field appears in Box 14: 

1. TP: Total cash tips reported to the employer, used to determine the qualified tip deduction. 
2. TT: Qualified overtime compensation, used to figure the new overtime deduction. 
3. TA: Trump account contributions made by the employer to an employee’s or dependent’s account. 
4. Box 14b: Treasury Tipped Occupation Code(s), up to two codes identifying the worker’s tipped occupation. This pairs with the Box 12 TP amount. Get it wrong, and the tip deduction can disappear entirely. 

Both trace back to the One Big Beautiful Bill Act (OBBBA), which created new above-the-line deductions for tips and overtime pay. The IRS created new boxes so employers have a standard way to report the amounts those deductions depend on. 

Where the numbers go next 

These boxes feed a new tax form, Schedule 1-A, which calculates the qualified tip and overtime deductions. A tool that doesn’t recognize codes TP and TT, or Box 14b, can’t populate the new 2026 Schedule 1-A correctly.  

2025 was a grace year for tax preparers. 2026 isn’t. 

For tax year 2025, the IRS gave employers a break: Notice 2025-62 provided penalty relief from separately reporting tips and overtime, and Notice 2025-69 confirmed the 2025 W-2 form wasn’t updated to accommodate those fields. Workers had to reconstruct those amounts from pay stubs and other records. 

That relief was temporary and limited to 2025 calendar reporting. The finalized 2026 Form W-2 includes dedicated boxes for reporting qualified tips and overtime pay, and employers must complete those fields for forms issued for the 2026 calendar year, with filing deadlines in 2027. The 2025 workaround no longer applies. 

Why these new W-2 box codes are a real problem for AI tax tools 

Most AI-assisted tax prep tools work the same way: They review your client’s prior-year return, carry the structure forward, and drop in this year’s numbers. 

That approach breaks down here: 

• Last year’s return has no TP, TT, TA, or Box 14b fields. They didn’t exist yet. 
• There’s nothing in the prior-year file for the AI to pattern-match against. 
• A tool that doesn’t recognize the new codes drops them, misreads them, or guesses, and a wrong guess on Box 14b can cost the client the entire tip deduction. 

This is the failure mode tax professionals are watching for. The Thomson Reuters Future of Professionals Report 2026 found that 90% of professionals said an AI tool’s reasoning has to be explainable and defensible before they’ll rely on it. “It looked right last year” doesn’t meet that bar when the form itself changed. 

Why Thomson Reuters Ready to Review handles AI tax preparation differently 

Ready to Review works from a different assumption: don’t copy last year’s return, read this year’s document. 

• It reads the client’s actual W-2, 1099, or other source document, rather than inferring fields from what last year’s return contained. 
• Every number it pulls links back to the exact page and field it came from, so a preparer can check it in seconds. 
• The AI doesn’t calculate the tax. The Thomson Reuters tax engine does, and it’s built to carry current-year law, including new fields like Box 12 codes TP, TT, and TA the moment they’re finalized. 

That combination, document-grounded extraction paired with an engine that owns the math, is what Thomson Reuters calls Fiduciary-Grade AI™. Accounting Today named Ready to Review a 2026 Top New Product on the strength of it. 

Here’s the real question to ask for the 2027 tax season 

The new W-2 boxes are a useful test for any AI tax tool, but “has it seen this form?” isn’t the right question. Every tool will claim yes. The better question: where did this number come from, and can you show me? For a return with TP, TT, or a Box 14b occupation code on it, that traceability is the difference between a deduction that holds up and one that quietly disappears. 

For the full picture, see how Ready to Review transforms the workflow, explore smarter tax workflow automation, or read the origin story behind Ready to Review. For advisory work, CoCounsel Tax and Ready to Advise extend the same approach.