https://plaintaxhelp.com/blog/ Plain-English posts on U.S. tax deadlines, new IRS figures, refunds and planning, sourced from official IRS and state pages. en-us Thu, 15 Oct 2026 06:00:00 GMT https://plaintaxhelp.com/blog/fourth-quarter-estimated-tax-payment-january-15-2027/https://plaintaxhelp.com/blog/fourth-quarter-estimated-tax-payment-january-15-2027/Thu, 15 Oct 2026 06:00:00 GMTFadal AbdulDeadlines & DatesThe 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.