Reviewed and updated October 16, 2026
Rules and decisions to review
- Request an extension by the original filing deadline using the applicable IRS method, such as Form 4868 or an eligible electronic payment marked as an extension.
- Make a reasonable estimate using current income and deduction records rather than copying the prior-year balance.
- Pay as much as possible by the regular payment deadline. Interest and possible late-payment penalties may accrue on unpaid tax.
- Keep extension acceptance and payment confirmations. State extension requirements and automatic overseas or disaster rules need separate review.
A practical example
A missing partnership Schedule K-1 may justify more filing time, but it does not eliminate the need to estimate the personal tax due. Use available business projections and withholding records to plan the payment.
Records to gather
Gather year-to-date income forms, expected K-1s, deductions, estimated payments, withholding and extension acceptance.
Your next step
Estimate the tax due before requesting more filing time and retain the extension acceptance. Set a document-completion schedule so the extension becomes a workable filing plan rather than an overlooked deadline.
Official sources
This guide provides general information. The rules depend on the tax year, jurisdiction and your circumstances. Ask our team which filing or planning steps apply to you.
