Hi Shivani,
"My question is what a person needs to do during the period between when he is liable to be registered and he actually gets GSTIN?
Can he collect GST?
Can he issue Invoice?
What he needs to do during that interim period (after he is liable and when he gets GSTIN)?"
Clarification: Since, a person having a period of 30 days to get registered himself from the date he is liable to get register such person will continue to issue invoices same as earlier he is issuing i.e without collecting GST from the customers.
Here I need to point out one thing clearly that he is not having any GST registration number (GSTIN) because he has a period of 30 days to register, hence witout having a valid GSTIN he cannot collect GST, since disclosure of GSTIN of supplier and Receipent is mandatory in Tax Invoice.
1. Don't do any extra things, do the things as such person doing before liable to get register.
2. No, he csnnot collect GST.
3. Yes, he can issue invoice,But without any GST.
After getting registered, he can issue revised invoices for outward supplies and also he is eligible to take ITC of input supplies(Inward supplies) from the date he is liable to get register. Please refer S 18(1)(a) of CGST Act,2017.
Note: Here, I expressed my view only and I am not liable for any actions taken based on the above opinion.