I need to file an extension for federal tax return. Turbo tax on line is not accepting this. How do i go about it ?

The following TurboTax help article will give you information about your options to file an extension for your 2024 tax return, including printing and mailing Form 4868 to the IRS.

How do I file an IRS tax extension?
 

Wait until about mid-March when the easy extension online form becomes available.