How to reset everything back to the beginning of the year

SUGGESTED

We entering many many incorrect disposals and would like to reset everything back to the way it was before we started doing any work in the 2021 system.  All we have is a backup of the system at the end of 2020 before we rolled over to 2021.  Is it possible to undo everything that was entered in the 2021 system so we can start from scratch?