Filing deadline for 5500 with short plan year

Can someone please offer clarification on the final filing deadline for a DB plan with short plan year and extension? The short plan year is for 2020 and the assets were all liquidated on 2/7/2020. That said, without an extension, the 5500 is due by 9/7/2020, right? Also, would the 5558 need to use a plan year end date of 9/7/2020 with an extension date of 11/22/2020. I have researched but did  not find situation with odd dates like this ours. Thanks!

The deadlines go to the end of the month.  From the instructions:

Short Years. For a plan year of less than 12 months (short plan year), file the form and applicable schedules by the last day of the 7th calendar month after the short plan year ends or by the extended due date, if filing under an authorized extension of time.

Thank you and yes that is correct. However, for final filings you have 7 months from date of liquidation which in this case is 9/7/2020. What date do I use for the Form 5558 to extend another 2.5 months-11/22/2020?

The first due date will be September 30th, 2020, not September 7th.

12/15/2020 if 5558 filed by 9/30/2020 (initial due date)

On 9/4/2020 at 3:43 PM, Kimberly Valentine-Pierrot said:

However, for final filings you have 7 months from date of liquidation which in this case is 9/7/2020.

Do you have a cite for that?  I thought, and apparently everyone else responding, that it was like any other short year - i..e the end of the month.

No cite exists.  It is the end of the month.

I can "cite" the 5500 instructions, I suppose, if that helps:

Short Years. For a plan year of less than 12 months (short plan year), file the form and applicable schedules by the last day of the 7th calendar month after the short plan year ends or by the extended due date, if filing under an authorized extension of time.

Thank you to all that responded! We did file the extension based on the end of the month of 9/30/2020 and the extension deadline of 12/15/2020. There was some other language that was not as clear that kept throwing a wrench in the mix. Again, A BIG THANKS ?