Karlsource control for SQL Server Basically the purpose is to look at historic data and highlight any invalid formats to the client, where if required they can place any necessary controls to prevent invalid VAT numbers being inputted....Old hand, am I right in saying that the code you provided looks at the format only?All of these businesses will be assigned a unique Goods and Services Tax Identification Number (GSTIN).But most are yet not aware of the new registration process and the identification number.

Paragraph 169(4)a) of the provide that a registrant may not claim an input tax credit (ITC) or an input tax refund (ITR) for a reporting period unless, before filing the return in which the ITC or the ITR is claimed, the registrant obtains the required prescribed information.GST is basically a 15-digit number which has replaced the Tax Identification Number (TIN) that business entities were allotted while registering under a state’s Value Added Tax law.