Tax Law
News, insights and expert analysis on tax law from the team at Kiplinger.
Latest
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Mailing Your Tax Return This Year? What to Know Before You Do
Tax Filing There are plenty of reasons not to mail your tax return this year, but here’s what you should know if you are.
By Katelyn Washington
Tax Filing -
Tax Day: Is the Post Office Open Late on April 15? What to Know for 2026
Tax Filing Tax Day means some people need to mail their federal income tax returns.
By Kelley R. Taylor
Tax Filing -
Already Filed Your Taxes? How (And When) to Change Your Return Without Delaying Your IRS Refund
Tax Returns Caught an error or missed a tax deduction after hitting submit? Before you rush to file an amendment, see which mistakes the IRS fixes for you and which ones require a Form 1040-X to save your refund.
By Chrissy Paradis
Tax Returns -
Tax Day Trivia: 6 Surprising Facts About Your 2026 Refund
Quiz Take this quiz to see how much you know about April 15th, 2026 — the last day to file your federal tax return.
By Kate Schubel
Quiz -
Missouri Tax Guide
State Tax Explore Missouri's state tax rates for income, sales, property, retirement, and more. Learn how Missouri compares nationwide.
By Katelyn Washington
State Tax -
District of Columbia Tax Guide
State Tax Explore the District of Columbia's tax rates for income, sales, property, retirement, and more. Learn how District of Columbia compares nationwide.
By Katelyn Washington
State Tax -
More States Have Flat Tax Rates for 2026: What It Means and Who Benefits Most
Income Tax Some states are moving to single‑rate income taxes or cutting existing brackets. That could change how much you keep every payday, especially if you’re thinking about where to live or work next.
By Kelley R. Taylor
Income Tax -
Capital Gains Tax Rates 2025 and 2026: What You Need to Know
Capital Gains Tax Navigating capital gains tax can be complex, but knowing the applicable tax rates and thresholds can help you plan your investments.
By Kelley R. Taylor
Capital Gains Tax -
When Are Estimated Tax Payments Due in 2026?
Tax Deadlines You make quarterly estimated tax payments to the IRS if you are self-employed or don’t have taxes withheld from your income for other reasons.
By Kelley R. Taylor
Tax Deadlines
