@Hannab4 see link; I don't see that any further extensions are possible unless you fall into one of the 3 bullets listed in this link.
https://www.taxpayeradvocate.irs.gov/news/tas-tax-tip-important-reminders-for-october-extension-file...
if you are due a refund, you have until Oct 15, 2026 to claim the refund. That is the deadline I'd worry about.
if you owe, then interest and penalties have been accuring since April 15 - best to make an estimated payment immediately to stop the interest clock.
