Topic
validation
2 guides on validation.
Tax
GSTIN — what the 15 characters tell you
GSTIN is 15 characters: 2-digit state code + 10-char PAN + 1-digit entity number + Z + 1-character checksum. Catches typos via base-36 weighted checksum.
3 min read
Tax
PAN card structure decoded — what each character means
Indian PAN is 10 chars: 5 letters + 4 digits + 1 letter. The 4th letter encodes holder type (P=Person, C=Company, F=Firm, T=Trust). Full breakdown with examples.
3 min read