An extension for filing the federal tax return can be completed and filed at any time on or before April 15, 2024. The extension does not extend the date for paying taxes owed, those must be paid on or before April 15, 2024 to avoid a failure to pay penalty.
Go to this TurboTax website to e-file an extension request - https://turbotax.intuit.com/irs-tax-extensions/
