Moved from NJ to DE end of 2021

My wife worked in NJ and retired on 12/3/2021 (so she had income in NJ from 1/1/21 thru 12/3/21).
We have also paid estimated quarterly NJ taxes. I am retired. We permanently moved from NJ to DE on 12/6/21.
 
Do we need to file a 2021 NJ income tax return as usual even though our residence has been in Delaware since 12/6/21? 
 
Do we need to file a 2021 DE income tax return since we resided in DE from 12/6/21?
 
Thanks!