A VAT number is a registered tax identification number in tax systems that use Value-Added Tax (VAT) . It is an identification number for VAT registered companies. VAT is a consumption tax charged at each stage of the supply chain, from production to distribution, all the way to the end consumer. The U.S. does not have a VAT system, but when required, companies may register and report VAT in the EU, UK, Australia, and parts of Asia.

Here are some key points about VAT numbers:

• A VAT number is exclusively for the Value-Added Tax scheme and is not the same as a local tax number or tax ID.
• VAT numbers can vary from country to country, but they generally have between 4 and 15 digits and start with the two-digit country code.
• VAT numbers are used to track how much tax a business pays and collects through purchases and sales.
• A VAT number is necessary for trade between EU Member States.
• In countries where GST is used, the GST number serves the equivalent purpose of a VAT number.
• The process of obtaining a VAT number varies by country, and businesses may need to submit documentation about their business and planned activities.
• Non-EU businesses may be required to appoint a local representative or fiscal representative when applying for a VAT number.

In summary, a VAT number is a tax identification number used in tax systems that use Value-Added Tax (VAT). The U.S. does not have a VAT system, but companies may need to register and report VAT in other countries. The process of obtaining a VAT number varies by country, and businesses may need to submit documentation about their business and planned activities.