Rental licenses question!!

[Kathy Tran]

Hi fellow investors!! 
I was finally able to get a property under contract !!! Now trying to do my due diligence. 
The property has a rental license for the duplex that just expired (April 2024) (I was able to look it up on atlas). I understand that I have to apply for a new rental license. Would I need to apply for a variance/get the zoning for it?  Also is there any information or documents I need to get from the seller that would be useful for getting the rental license

Thanks for your time!