It's ridiculous, there's no way to submit one and they don't answer questions on the forum about how to submit when people ask. Horrible first experience as a new customer. 

It is a a maze trying to find where the Ticket Submission section is.  

Luckily I found it and favorited:

https://support.box.com/hc/en-us/requests/new?&referrerPageUrl=https://support.box.com/