No, if you are a calendar year filer who is living outside the country on the regular deadline, you qualify for an automatic extension until June 15, 2021. This gives you additional time to file your return and pay any taxes due without having to request an extension.
If you're either:
For additional information, refer to Publication 54, Tax Guide for U.S. Citizens and Resident Aliens Abroad.
However, if you are not ready to file your individual income tax return on June 15, 2021. In this case, you can request an extension by filing Form 4868 (Application for Automatic Extension of Time to File US Individual Income Tax Return). Form 4868 extends the tax filing deadline to October 15, 2021, which will give you an additional four months to prepare.
The additional 4-month period is the extension of time to file and NOT an extension of time to pay. One important thing you need to remember is that interest will still be charged on payments made after the regular due date (May 17, 2021) without regard to the extension.