The default quota for HOME is 100 GB. Your HOME usage and limits are displayed with the quota command.
Example:
isgs2023$ quota -s
Disk quotas for user c0XXXyyyyy (uid 40XXX):
Filesystem space quota limit grace files quota limit grace
/dev/mapper/ubuntu--vg-lv--1
24K 10240M 11264M 6 0 0
You can see that c0XXXyyyyy used approximately 24 kilobytes.