An extension does not give you extra time to pay your tax due. It only gives you extra time to file your Form 1040. 2019 tax due is due today--July 15, 2020. If you cannot pay, then you will just be late.
If you file an extension and pay "something" with your extension request, it may lessen the late filing penalty/interest you will be subjected to for paying late.
You may also want to look at payment plans.
https://www.irs.gov/payments/online-payment-agreement-application
https://ttlc.intuit.com/community/extensions/help/how-do-i-file-an-irs-extension-form-4868-in-turbot...
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
