GTA service query

Venkatesh K N (student) (178 Points)

25 September 2020  
Im already GST registered (1cr t/o) person in selling cement n steel.
On 1st Sep I bought new truck for goods transport for own goods and now I planing for gta service to others.
My query is shall I take new registration for GTA service? Or can I include this service in my old GSTIN?May I have to issue gst tax invoice or consignment note for considered amount?