GST registration for exhibition.

you don't have to take registration in each and every state where do you carry on your exhibition business you have to take registration of your business where your head office is situated or branch office is situated in any state of India then you take the recession if you are aggregate turnover exceed Rs 10 lacs or 20 lacs. plz note that the concept of casual taxable person exist in goods case only. plz take mandatory registration u/s 24 and charge IGST on your bill if providing inter state exhibition service.