The GST Number consists of 15 digits.
Its bifurcation is as below:
First two Digits-The first digit of GSTIN is state code
Next 10 Digits-It is the PAN number of a business entity like your shop, mall or company.
13th Digit-It indicates the number of registrations as a business entity has within a state for the same PAN. It will be an alpha-numeric number (first 1-9 and then A-Z) and will be assigned on the basis of the number of registrations a legal entity (having the same PAN) has within one state.
14th Digit-It will be by default as Z.
15th Digit-The last digit will be a check code which will be used for detection of errors.
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