#tax-deadlines
Important tax filing deadlines and compliance dates to remember
The IRS retires the FIRE e-filing system on December 31, 2026, requiring all 1099 and W-2 filers to switch to IRIS for tax year 2026 returns, and a new Transmitter Control Code alone can take 45 or more days to approve.
About 30 U.S. states let businesses keep a percentage of the sales tax they collect — a vendor discount or collection allowance — for filing and paying on time, with Colorado eliminating its discount and South Dakota suspending its own heading into 2026.
The Section 30C credit returns 30% of EV charger cost — up to $1,000 per port for homeowners and $100,000 per port for businesses — but sunsets after June 30, 2026. A line-by-line guide to census tract eligibility, prevailing wage and apprenticeship rules, depreciation interaction, recapture, and Form 8911.
Form 3520-A is the annual information return for a foreign trust with a U.S. owner, due March 15. If the foreign trustee does not file, Section 6677 imposes an initial 5% penalty on trust assets plus $10,000 per 30-day continuation period — payable by the U.S. owner. Covers who files, the substitute filing path, the reasonable-cause defense, and how to clean up multi-year non-compliance.
Section 7508A lets the IRS postpone almost any tax-related deadline by up to one year after a federally declared disaster. This guide explains who qualifies as an affected taxpayer, how postponement interacts with Form 4868, what happens to penalties already accruing, and when to elect a prior-year casualty loss under Section 165(i).
Section 7508A lets the IRS postpone tax deadlines up to one year for taxpayers in federally declared disaster counties—usually automatically by address. A Section 165(i) election can also move a casualty loss to the prior year's return for a faster refund.
Texas raised the franchise tax no-tax-due threshold to $2.65 million for 2026 and 2027 reports, but LLCs and corporations still owe a Public Information Report by May 15. Missing it triggers forfeiture, personal liability for officers, and loss of access to Texas courts.
A working guide to the 2026 quarterly estimated tax rules for freelancers and self-employed earners — the two IRS safe harbors (90% current year, 100%/110% prior year), the four uneven due dates, Form 1040-ES, the annualized income method for lumpy earners, EFTPS vs Direct Pay, and the mistakes that trigger penalties at the 6–7% federal rate.
Schedules K-2 and K-3 pulled even purely domestic partnerships and S-corps into international tax reporting starting in 2021. This guide explains the 2026 filing rules, the four-condition domestic filing exception, the January 15 partner notification and February 15 1-month K-3 request deadlines for calendar-year filers, the $250,000 small entity carve-out added in 2024, and the per-partner, per-month penalty math for non-compliance.
Form 2290 funds federal highway maintenance through an annual excise tax on vehicles with a taxable gross weight of 55,000 pounds or more. Owner-operators and fleets owe up to $550 per truck and must file by August 31 — late filings trigger a 4.5% monthly penalty and DMV registration suspension.
Form W-2c fixes errors on previously filed W-2s, but the penalty structure stacks behind the original February 2 due date — $60, $130, $340, or $680 per form depending on how late you file. A practical guide to W-2c and W-3c filing, the 10-return e-file threshold, SSA mismatch letters, and reconciling with Form 941-X.
How Applicable Large Employers file Forms 1094-C and 1095-C for the 2025 reporting year. Covers the March 2 and March 31, 2026 deadlines, the post-2024 furnishing-on-request rule, the 2026 penalty amounts ($3,340 and $5,010 per employee), the new 90-day Letter 226-J response window, and the Line 14/16 coding errors that most often trigger IRS audits.
