About gst registration under services

Its advisable to take registration in AP, for such type of contract.

Yes, under same GSTIN he can supply goods/services through out india

sir, but proof of  idetity and address of documents belongs Bihar State, but i fillied application in address coloymn as per Audhar card, it is auto fiiled in the place of business in State coloumn, it is not modified,  so how he will take registration AP,  please advise me.