Hi All,

Please take a look at Article below:

1. dependent on single table
2. dependent on two tables using referene

[SOLVED]: - Dependent variable on Catalog item using Lookup Select Box
https://community.servicenow.com/community?id=community_article&sys_id=1ce7dceedb5914101cd8a345ca961952

If my answer solved your issue, please mark my answer as ✅ Correct & 👍Helpful based on the Impact.

Thank you!
Regards,
Kailash.