The terms such as PAN, VAT, TIN, DSC, DIN, and TAN are closely related to business. PAN is a unique code which acts as identification of tax-paying individuals. It is issued to all individuals under the Income Tax Act of 1961 and all the taxpayers in the country should possess the unique number for various financial transactions. The PAN number will contain the history of all such transactions done by an individual in its account.

You can apply for pan card online or offline, if you have applied but did not received hard copy, you can check your PAN card status online.
VAT or TIN is tax identification payer number given by the tax department of respective state governments to perform VAT related transactions. TIN is required for dealers under the VAT registration. DSC (Digital Signature Certificate) acts as a proof of identity for electronic and online transactions. These are used by several departments such as the income tax department, foreign trade, and employee provident fund. They are used to file income tax returns or to register a company.
DIN (Director Identification Number) on other hand is issued to the directors of companies. It is unique identification number given to them which has all the personal information of the director. However, one needs to apply for DSC before getting DIN.
Now Lastly what is TAN?, TAN stands for Tax Deduction and Collection Account Number. All business entities which require to deduct tax will require a TAN number. The company is required to use this number for all their tax deductions, collections, and payments of tax made under their roof. A penalty will be imposed in case the business does not possess this number.