Calculate Tax Withholding For 2025. The federal tax calculator is updated for the 2025/26 tax year and is designed for quick online tax calculations by entering your gross (total) income from tax form 1040 and your gross expenses from tax form 1040 for 2025/26. Estimate your tax refund or how much you may owe the irs with taxcaster tax calculator.

Will your income tax withholding and refundable credits* (see footnote 1) be at least 100% (see footnote 2) of the tax shown on your 2023 tax return? Turbotax offers a suite of tax tools and calculators to help you save money.