SEARCH GST DEALER GSTIN BASIS Goods and Service Tax Identification Number ("GSTIN") is a unique 15 digit Number which is allotted to each and every dealer who is registered under Goods and Service Tax law. For the purpose of proper transfer of Input Tax credit and all related compliance, it is important to have correct GSTIN of every dealer (i.e., supplier or customer). So verifying GSTIN is a hassle? No worries. We have made it simple for you. You can simply check whether GSTIN you have of other person is correct or not on GetCompanyDetails by clicking on "Search by GSTIN". Ensure the correctness of GSTIN and don't risk to lose a single penny of ITC.