What is the difference between TIN and VAT in Vtiger CRM?

A TIN (Tax Identification Number) is a general number issued for tax purposes, while VAT (Value Added Tax) is a specific type of tax. In Vtiger, the number is stored as a TIN since only the number itself is submitted. If you need the label VAT to appear before the number, you can enter it in this format: VAT: [number].