If you mean a tax return for an S-corps, C-corps or multi-member partnership business---your filing deadline was March 17, 2025 so it is too late for an extension and your penalties are already adding up.
If you mean for a sole proprietor business for which you prepare a Schedule C--
Remember that an extension does not give you more time to pay. You need to pay your tax due by April 15. The extension only gives you more time to prepare and file your tax return forms.
https://turbotax.intuit.com/irs-tax-extensions/
What kind of business are you trying to file an extension for? Some filing deadlines for business tax returns has passed.
Refer to the TurboTax article Every Tax Deadline You Need To Know for more information.