@peggypricetx Regulation 1.6081-4(b) states these are the requirements for an extension:
(b) Requirements. To satisfy this paragraph (b), an individual must -
(1) Submit a complete application on Form 4868, “Application for Automatic Extension of Time To File U.S. Individual Income Tax Return,” or in any other manner prescribed by the Commissioner;
(2) File the application on or before the later of -
(i) The date prescribed for filing the return; or
(ii) The expiration of any extension of time to file granted pursuant to § 1.6081-5;
(3) File the application with the Internal Revenue Service office designated in the application's instructions; and
(4) Show the full amount properly estimated as tax for the taxable year.
So according that that, if you do not "show the full amount of properly estimated tax", it does not meet the requirements of an extension. That is why Form 4868 also says "Qualifying for the Extension - To get the extra time, you must: 1. Properly estimate your 2022 tax liability using the information available to you"
