What is vat no.?

A VAT number is a unique identification number assigned to businesses that are registered for VAT, or Value Added Tax. VAT is a consumption tax added to goods and services at each stage of production, and the VAT number is used to track a business's tax liabilities and payments.

The format and use of VAT numbers vary by country. In the UK, for example, a VAT number is a nine-digit number beginning with "GB" and followed by the company's registration number. In the EU, VAT numbers generally consist of a country code followed by a series of digits.

Businesses must display their VAT number on invoices and other official documents, and may be required to provide their VAT number to customers or suppliers. Failure to register for VAT or comply with VAT regulations can result in penalties or legal action.