I can't find where I file extension I know I'm a few days late

It depends on what program you are using. See your options here: How do I file an IRS tax extension? - TurboTax Support - Intuit

 This will extend the time you have to file your taxes until October 15th, 2025.  

Also, you may have to do your state taxes: Do I need to file an extension for my personal state taxes?  

Remember, an extension gives you more time to prepare your taxes, but it doesn't extend the time to pay your taxes.  If you have an indication that you will owe taxes, you should make the payment by the original due date of the tax return to avoid additional interest and penalties. 

Sorry you are too late to file an extension.  It had to be filed by April 15.   Just file your return as soon as you can.  You can efile until Oct 15.  The extension is just to file the return, any tax due was still due on April 15.  If you are getting a refund there is no penalty for filing late.  

Unless you live in a federally declared disaster area that has an automatic extension, or are in a combat zone, it is too late and you have missed the deadline to request an extension.  Now your tax return is just late.   If you are getting a refund or do not owe, there is no penalty for filing after the deadline.  If you owe tax due, you are subject to late filing penalties and interest.