The prescribed information in the regulations is notably to the effect that the registration number has to be provided on sales of or more.Both the CRA and RQ have disallowed ITCs or ITRs claimed by registrants on purchases where the registration number provided by their suppliers was not valid.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.Such businesses also had to get several other identification numbers from various places.If so, it might make more sense to carry out this logic there rather than make a roundtrip to the database server.Then again, your implementation might well require this logic to be on the server .
On its part, the government has kept the process of online registration for GST quite simple.
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.
Similarly, service tax registration number is assigned to a service provider by Central Board of Excise and Customs (CBEC).
Under GST regime, all these parties will come under one single authority and the different identification numbers will be replaced by a single type of registration number for everyone (GSTIN).