How to read a W-2 box by box: wages, withholding, Box 12 codes and why Boxes 1, 3 and 5 differ, explained from the IRS 2026 W-2 instructions.
Why do I owe taxes this year? Compare tax and payments across two returns to find what changed, plus IRS penalty and payment plan rules for 2026.
Why did I get a tax refund? Trace it on the return: tax owed vs. payments made. Learn the common causes and what a large refund means, per IRS pages.
How does tax withholding work? W-4 steps, pay frequency and wages set each paycheck’s tax. See what the form controls, per IRS Publication 505 (2026).
Tax filing status explained from IRS Publication 501: the five statuses, the December 31 rule, and the order used to find the status that applies.
Standard deduction vs itemized, worked line by line with IRS 2025 figures: which Schedule A caps and floors shrink the total before the comparison.
Refundable vs nonrefundable tax credit, explained with IRS examples: what happens to leftover credit, why both can raise a refund, and the February hold.
Tax deduction vs tax credit, worked through with 2026 IRS rates: why a $1,000 deduction and a $1,000 credit cut a tax bill by very different amounts.
Marginal vs effective tax rate, worked through the IRS 2025 brackets: why a raise never lowers pay via brackets, and where phaseouts do bite.
How is income tax calculated step by step: gross income to AGI to taxable income to tax, with a worked 2026 example using IRS brackets and deductions.