One LLC with multiple Rentals - where to book overhead costs?

Hello, I have a multi-member LLC with multiple rentals.  I have annual overhead expenses such as the registration for the LLC, tax prep expense, etc.  Can I just pick which property to assign these expenses to or must I divide them up or where do they go?  The properties are in different states so maybe I take the expenses against the property in the state with the higheset state tax?  I am using TT Business.  Thanks for any advice!