Is there any paperwork in Montgomery county Maryland for house hacking?

[Kal Wol]

Hello dear BP, I am learning a lot from all of you and thank you for being a great source for all us.

I have my primary house in Germantown MD and I would like to work on the house hacking. I wanted to check first if there is any paperwork that I have to do to handle that. 

The house is 4BR 3.5BA single house the basement has its own bath but not kitchen, only wet bar. So what things should I be considering and what tax related ones shall I know before I go this route? 

I see roomies.com seems to be a good place to find tenant for house hacking, do you have any other suggestion to source the tenant and also to check the background?

Thanks a lot,
Kal