GST registration

T.V.Srinivas (STUDENT AND TAX CONSULTANT(PART TIME))   (123 Points)

25 October 2017  
Sir I have a shop selling of metal and plastic pipes from 5years previously I have a TIN no, but still now I did not apply for GST
What should I do, whether to take a new GST registration or any other way?
pleas help me regarding this issue