I guess you haven't seen the posts where S Corps and Partnerships are receiving penalty notices for failure to file then. A VERY close reading of the notice shows this:
A. Taxpayers Affected by COVID-19 Emergency
The Secretary of the Treasury has determined that any person (as defined in section 7701(a)(1) of the Code) with a Federal tax payment obligation specified in this section III.A (Specified Payment), or
a Federal tax return or other form filing obligation specified in this section III.A (Specified Form), which is due to be performed (originally or pursuant to a valid extension) on or after April 1, 2020, and before July 15, 2020, is affected by the COVID-19 emergency for purposes of the relief described in this section III (Affected Taxpayer).
Note that in order to be an Affected Taxpayer the dates After April 1, 2020 and before July 15
Then there is this from the IRS website which has been updated for Notice 2020-23
Q. Are the filing deadlines for partnerships and S-corporations whose returns were due to be filed on March 16, 2020, postponed?
A. Notice 2020-23 does not postpone any return filings that were due on March 16, 2020. If a fiscal year partnership or S-corporation has a return due to be filed on or after April 1, 2020, and before July 15, 2020, that filing requirement has been postponed to July 15, 2020. For information about additional relief that may be available to partnerships in connection with the CARES Act legislation, please see Rev. Proc. 2020-23 (PDF).
Here is the link:
https://www.irs.gov/newsroom/filing-and ... nd-answers