Looked all over and only found small blurb in jail(8) manpage that really says next to nothing. I created /usr/jails/fulljail by un-compressing the downloaded base.txz file and then copying the hosts localtime file and resolv.conf file to the fulljail. This fulljail starts and stops with out problems. I have added a user called daddy to this jail.
On the host I added quota_enable="YES" and check_quotas="YES" to the hosts rc.conf file. Also added userquota option to the hosts /etc/fstab file which filesystem covers the complete hard drive and rebooted the host.
The quota commands repquota -ah, quota -h bob, and edquota -uh bob all work on the host.
But after starting the fulljail with the allow.quotas option in jail.config and entering the root console I get this
edquota -uh daddy message "NO quotas on any filesystem
repquota -ah gives nothing
quota -h daddy message Disk quotas for user daddy (uid1001): none
I see that quota had bug fixed in 12.0 that is now in 12.1 release that I am running on my host. Did that fix screw up jail quotas? Does the /etc/fstab file in fulljail need a entry? The FreeBSD manual needs a section added to the jail section giving the details of how to configure a jail to use quota.