What is gst registration number?

GSTIN, short for Goods and Services Tax Identification Number is a unique 15 digit identification number assigned to every taxpayer ( primarily dealer or supplier or any business entity) registered under the GST regime. Obtaining GSTIN and registering for GST is absolutely free of cost.Gst Registration of any business entity under the GST Law implies obtaining a unique number from the concerned tax authorities for the purpose of collecting tax on behalf of the government and to avail Input tax credit for the taxes on his inward supplies.