Intuit Austin posted this maybe a week ago. 

What is the source of this information ? We cannot find this info on the IRS site. 

The due date of the taxes in Texas is June 15th 2021, but it seems odd that the date to file an extension would a month before the due date. 

I could not reply under the original post. 

https://proconnect.intuit.com/community/lacerte-tax-news-updates/discussion/re-how-do-i-handle-retur...

For tax year 2020, taxpayers residing in federally declared disaster areas who require additional time to file beyond the extended deadline (June 15, 2021), should file a Form 4868 by May 17, 2021 to obtain a filing extension up to October 15, 2021. For both paper and electronic submissions, Form 4868 filing and accompanying payments must be submitted by the May 17, 2021 deadline.