https://www.irs.gov/newsroom/irs-update-for-form-990-t-form-1120-pol-filers-with-upcoming-deadlines-...
EDIT: Although this doesn't say anything about extensions. I knew about this because I have a 990-T waiting to be efiled. Fortunately its extended due date is 8/15/24.
The more I know the more I don’t know.
