Typical RE investment LLC startup deductions

[Geoffrey Hoffmann]

Hi I am getting started and can’t find info on what can be deducted for this type of business during the startup period. ( yes, I will speak with a CPA ASAP.)

in the meantime what are some examples that I can deduct in the first year before I have bought a rental property?

also when does the buisness “start” for tax purposes?  When I start planning or when I collect my first rent check?