Fourth-Quarter Estimated Taxes Are Due January 15, 2027
The last 2026 estimated tax payment is due January 15, 2027. See who has to pay, how the penalty works and the one way to skip the payment.
Read the postFree guides, calculators and checklists for U.S. taxes — with every answer linked to the official IRS or state source, and no sign-up.
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52plain-English guides & answers
51state guides (50 + DC)
5free tools & calculators
IRS.govprimary source, linked on every page
Ranked by our keyword research (search-suggestion data from October 2026) — not by this site’s traffic.
A detailed guide to every legitimate way to file U.S. taxes for free: IRS Free File, Free File Fillable Forms, VITA and TCE, state programs, MilTax and what happened to Direct File. Check current-year eligibility.
ReadHow to file your federal taxes for free: IRS Free File, Fillable Forms, VITA, MilTax and state options, who qualifies for each, and how to avoid “free” traps.
ReadIRS Free File eligibility: the AGI limit for the most recent filing season, partner-specific rules, how to start, and what to do if you do not qualify. Check current-year details.
ReadWhat IRS Free File Fillable Forms are, who can use them (no income limit), what they do not include, and tips for filing accurately. Verify current-year dates on IRS.gov.
ReadFederal income tax brackets for tax years 2025 and 2026 with tables for single and married filing jointly, plus how marginal rates actually work, with examples and common myths.
ReadStandard deduction vs itemized: 2025 and 2026 standard deduction amounts, what you can itemize, the SALT cap, how to compare and when itemizing pays off.
ReadHow to check your IRS federal tax refund status with Where’s My Refund?: what you need, what the three statuses mean, when to check, and what to do if there is no update.
ReadEverything about federal tax refunds: how refunds are calculated, typical timelines, how to track yours, why refunds get delayed or reduced, and how to speed things up.
ReadFederal tax deadlines: filing day, extension deadline, estimated tax due dates, W-2 and 1099 dates and state differences, with 2026 and 2027 dates. Always verify on IRS.gov.
ReadPrivate, instant and clearly labeled estimates. Figures come from IRS.gov.
See which deduction is bigger for 2025 or 2026 — including the SALT cap and the medical-expense floor.
Open the toolYour marginal and effective rate, tax by bracket and the dollars left before the next bracket.
Open the toolCompare your expected tax with what is withheld — and see a per-paycheck adjustment.
Open the toolFour quick questions point you to Free File, Fillable Forms, VITA or MilTax.
Open the toolA live countdown to the next federal deadline and the key dates for 2026–2027.
Open the toolShort, sourced posts on deadlines, new IRS numbers and year-end planning.
The last 2026 estimated tax payment is due January 15, 2027. See who has to pay, how the penalty works and the one way to skip the payment.
Read the postIncome tax type, filing agency, free filing options and official links for all 50 states and DC.
9
states with no broad wage income tax
16
states with a flat-rate income tax
26
with graduated brackets (incl. DC)
A plain-English, step-by-step guide to filing your federal tax return: who must file, documents to gather, choosing a filing method, deductions, deadlines and what happens after you file.
Read the guideFederal income tax brackets for tax years 2025 and 2026 with tables for single and married filing jointly, plus how marginal rates actually work, with examples and common myths.
Read the guideA practical guide to individual tax deductions and credits: the difference between them, the standard deduction, major credits, common deductions, new 2025 deductions, and how to avoid claiming what you do not qualify for.
Read the guideA plain-English guide to self-employed taxes: self-employment tax, Schedule C, quarterly estimated payments, deductions, records and common mistakes for freelancers, contractors and gig workers.
Read the guideEverything about federal tax refunds: how refunds are calculated, typical timelines, how to track yours, why refunds get delayed or reduced, and how to speed things up.
Read the guideA detailed guide to every legitimate way to file U.S. taxes for free: IRS Free File, Free File Fillable Forms, VITA and TCE, state programs, MilTax and what happened to Direct File. Check current-year eligibility.
Read the guideChecklists save your progress in your browser and print cleanly.
A printable tax document checklist: IDs, income forms, deduction and credit records, bank details. Check items off before you file your federal return.
Open checklistPrintable itemized deductions checklist for Schedule A: state and local taxes, mortgage interest, charitable gifts, medical expenses, and records to keep.
Open checklistPrintable checklist of common deductions and records for freelancers, independent contractors and gig workers filing Schedule C.
Open checklistTen legitimate ways to file taxes for free or nearly free: IRS Free File, Fillable Forms, VITA, TCE, MilTax, state portals, paper filing and more, with who each suits.
See the listTwenty tax breaks people often overlook, from the saver’s credit and student loan interest to HSA contributions, state taxes and the new 2025 deductions, with eligibility notes.
See the listTwelve common tax filing mistakes that slow refunds or trigger IRS letters — wrong SSNs, bank errors, missing income and more — and how to avoid each one.
See the listWe write from IRS.gov and state revenue agencies and link them on every page. We avoid quoting a dollar figure unless we are confident of it for the year stated.
Calculators show the figures they use, say what they leave out, and never pretend to be tax advice. Your entries stay in your browser.
We do not claim to be CPAs or enrolled agents. Read our editorial policy and About page.
The short version. Every guide goes deeper and links to the official source.
Yes. Every guide, calculator and checklist is free to read and use, and there is nothing to sign up for. The site is intended to be supported by advertising, which never decides what we write.
Mainly IRS.gov and state revenue agency websites. Pages link to the official source behind each claim, and we say plainly when a number changes from year to year.
Often, yes. If your 2025 adjusted gross income was $89,000 or less, IRS Free File guided software is free for the federal return. Any income can use Free File Fillable Forms, and VITA volunteers help people who qualify. See the free filing options.
They use figures published by the IRS and checked on October 15, 2026, but they are estimates that leave out many real-life details. Use them for planning and confirm with IRS.gov or a qualified professional.
No. Plain Tax Help is an independent publisher. We are not affiliated with the IRS, any state agency or any software company, and nothing here is tax, legal or financial advice.
General information only — not tax, legal or financial advice. Tax figures change every year; verify the current numbers at IRS.gov or with a qualified professional. Read the full disclaimer.
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