Calculate 2025 Tax Refund Withholding. What you enter on your w4 form determines to a great extent if you get a tax refund or owe taxes with your tax return. How to calculate federal tax based on your annual income.

Get an accurate estimate based on current irs tax information below. Use smartasset’s tax return calculator to see how your income, withholdings, deductions and credits impact your tax refund or balance due amount.