Once the IRS changed the deadline from April to July, the deadline to file the extension form also moved to July. Since we are after 15 April you can submit the completed extension application form and what you owe on or before 15 July.
From the FAQ:
Q. What if I am unable to file my 2019 income tax return that was
originally due on April 15, 2020, by July 15, 2020?
A. If you are an individual, you can request an automatic extension
to file your Federal income tax return if you can’t file by the July
15 deadline. The easiest and fastest way to request a filing
extension is to electronically file Form 4868 through your tax
professional, tax software, or using the Free File. Businesses,
including trusts, must file Form 7004 to request an automatic
extension.
You must request the automatic extension by July 15, 2020. If you
properly estimate your 2019 tax liability using the information
available to you and file an extension form by July 15, 2020, your tax
return will be due on October 15, 2020. To avoid interest and
penalties when filing your tax return after July 15, 2020, pay the tax
you estimate as due with your extension request. The extension only
gives you additional time to file, it does not give you additional
time to pay beyond July 15, 2020. If you do not pay your taxes by
July 15, you will be subject to interest and penalties from July 16
until the date of payment.
U.S. citizens and permanent residents with a tax home in a foreign
country who need an extension must file Form 2350 by July 15, 2020, if
they can’t file their 2019 income tax return by the July 15 deadline.
They should pay their taxes by July 15 to avoid interest and
penalties.
Note: this is only true for Federal taxes, your state may have shifted their due date differently.
