RE: 2021 - Year End Update for GP2016
The post referenced above is related to the release of a mid year patch
Directly from the post you reference -----
"Please take note, this is the LAST update for Dynamics GP 2016. If you are on this version (GP 2016) you will not receive a year end update for the 2021 year so it is in your best interest to start to upgrade to 18.3 or the 18.4 release come this Fall 2021! At this point we do not know what year end changes will bring if any."
This is not saying anything but - 2016 is not getting a 2021 Year End update - "it is in your best interest to start the update to 18.3"
Sorry to say, but there is not going to be a GP2016 update for 2021 Year End.