The 2026 federal tax filing season is officially underway, and US taxpayers can now submit their 2025 federal income tax returns using Form 1040. The Internal Revenue Service (IRS) began accepting and ...

If you’re preparing your taxes, you'll file federal income tax Form 1040. Because tax laws change often, Form 1040 might have subtle differences from year to year. Form 1040 is the main form that ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Lea Uradu, J.D., is a Maryland state registered tax preparer, state-certified notary public, ...

When you amend a federal tax return, you can correct mistakes or errors made on your original one. Here’s what you need to know about the process, including when to file, what documents you’ll need, ...