How can an application for fresh registration be made under GST? Within what time will registration be granted

Application for fresh registration is to be made electronically on the GST common portal (www.gst.gov.in) in FORM GST REG-01. If the details and documents are in order, registration will be granted within 3 working days, except in cases where an objection has been raised within this period in which case registration will be granted within a maximum period of 17 days.

(FAQ 15: MSME)

How do I make supply, if I have not applied for registration

You should apply for registration at the earliest on the GST common portal and obtain application reference number (ARN). You need not disrupt your business and may continue to make supplies on invoices without GSTIN. The
application for registration must be made within 30 days of the turnover crossing Rs.20 lakhs or attracting any of the conditions mentioned in section 24 of the CGST Act, 2017. After registration, you can issue revised invoices as
permitted under section 31(3)(a) of the said Act. These supplies should be shown in the return and taxes paid on them.

(FAQ 14: MSME)