There is no cost to file an extension on your taxes. Please review the following information on how to file an extension.
An IRS extension gives you until October 16 to file, but it doesn't give you until October to pay your taxes. Those are still due by midnight, April 18.
Here's 5 different ways to file your federal extension:
how much does a federal extension cost for 2020?
how much does a state of California extension cost for 2020?
how much does a state of Kentucky extension cost for 2020?
$0, $0, and $0 See this link for more information: How to file an extension - TurboTax