How can I use Nesting categories in three levels in self hosted plan

[merefield (Robert)]

Can we increase the sub-category dept level?

There is a hidden max_category_nesting site setting that you can play with if you’re self-hosted. You’d need to set it with an ENV variable in your app.yml or at the rails console. I’m pretty sure that it’s largely unsupported (my guess is that it likely works because enterprise customers are using it, but you’ll probably be on your own to figure it out in the near term), so using tags is almost certainly the better approach.