Add-on Looking for a way to add fields on creating a new thread

Hello !

I'm looking for an addon for Xenforo 2 which will edit the way to create a new thread in a specific category (which will be the support one).
Currently, when you create a post, it ask : title + your message
But I would like somehting like : title + your message + logs + ...

And then, when the user post it, you can see the title and the message of course, and the content put in logs field.

Does anyone as a idea where I can find something like that ?
Thanks :)