Five Common Tax Filing Mistakes to Avoid Ahead of April 15, 2026 Deadline

Tax Day falls on April 15, 2026, requiring most taxpayers to file their federal income tax returns by that date. An extension can provide additional time to submit paperwork, but payments owed are still due on April 15. Errors in filing can result in IRS notices, penalties, or delays in processing refunds.

Taxpayers facing life changes, such as marriage, divorce, or the birth of a child, may encounter confusion in determining their filing status. Using IRS online tools or tax software can assist in selecting the correct status.

Filing Status Filing status determines tax rates, standard deductions, and eligibility for credits.

Incorrect selection can increase taxes owed or reduce refunds. For head of household status, taxpayers must pay more than half the cost of maintaining a home for a qualifying dependent; misclaiming it may require repayment of benefits plus penalties and interest. Qualifying surviving spouse status applies in the year following a spouse's death under specific conditions.

Taxpayers unsure of their status should consult IRS guidelines. Life events like supporting an aging parent or shared custody can affect eligibility.

The deadline to pay taxes owed is April 15, 2026, regardless of an extension for filing.

Taxpayers should estimate and pay their liability by this date to avoid penalties and interest. Partial payments can reduce accruing costs if full payment is not possible.