What the IRS says changed (and when)

The IRS guidance for individuals and workers lists “Page Last Reviewed or Updated: 01-Jul-2026.” The broader Working Families Tax Cuts hub lists “Page Last Reviewed or Updated: 06-Jul-2026.”

In a separate IRS Tax Tip, the agency also warns that some filing-season updates can apply retroactively to 2025—meaning your withholding or estimated tax may not match what you ultimately qualify to claim.

IRS items that can shift a 2025 refund or tax bill

The IRS’s individual-and-worker guidance highlights several provisions where eligibility (and documentation) matters. Depending on your situation, these can move the numbers behind your refund or tax due:

• Inflation-adjusted standard deduction for 2025: the IRS lists $31,500 for married couples filing jointly, $15,750 for single filers and married individuals filing separately, and $23,625 for heads of household.
• Additional deduction for seniors (effective 2025–2028): individuals age 65+ may claim an additional $6,000 deduction (phased out based on modified adjusted gross income).
• No tax on tips (effective 2025–2028): eligible tipped workers may deduct up to $25,000 for qualified tips (with specific reporting and eligibility rules).
• No tax on overtime (effective 2025–2028): eligible overtime pay can qualify for a deduction of up to $12,500 (or $25,000 for joint filers), if it meets the IRS requirements.
• No tax on car loan interest (effective 2025–2028): the IRS describes a deduction for qualified passenger vehicle loan interest up to $10,000, including that the loan originated after Dec. 31, 2024 and that you must include the VIN on your return when you claim the deduction.

Quick checklist before you file (or before you finalize a return)

• Check eligibility, not just your job title: the IRS provisions are conditional (for example, age, income phaseouts, and what counts as “qualified” tips, overtime, or vehicle-interest).
• Gather the specific documents: if you’re claiming items like qualified tips or overtime, make sure you have the IRS-described reporting you’ll need (commonly tied to how income is reported on tax forms).
• Re-check withholding/estimated-tax assumptions: if your refund or tax due surprises you, it may reflect that retroactive eligibility changed the deductions you can actually claim.

If your result is different from what you expected

The main household takeaway from the IRS warning is simple: because some changes can apply retroactively to the start of 2025, your withholding or estimated tax may not have been calibrated to your final eligible deductions and credits. If the outcome doesn’t match your expectation, consider updating future withholding (for W-4) or estimated tax so next year’s numbers better match your real tax situation.

Sources

• IRS newsroom: Working Families Tax Cuts – Individuals and workers