GST registration to PURCHASE MACHINE

Jayesh (Executive - Account/Logistic)   (23 Points)

22 June 2019  
I am purchasing a machine from other state to start my new proprietorship business.

I have made a advance payment against machinery on 02 May 2019.

Seller ask my GST no. to send machine and raise invoice.

In this situation I need GST no. but GST registration poratl is asking date of commencement of business and date of liability. and I have not started my business yet.

Please advise what I should I fill in date of commencement.

Please also advise is it mandatory to register under GST to purchase a machine from other state from a GST registered seller.

Regards,
Jayesh