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!