Specifies the contact's Tax registration number. This field is valid for companies only.
If the contact is integrated with a customer, vendor or bank account, this field is used when you conduct business with contacts from other EU countries/regions.
Tax Registration No. Validation
You can use an EU web service to verify that Tax registration numbers that you enter on customer, vendor, or contact cards are valid.
When you modify the Tax Registration No. field on a card where the value in the Country/Region Code field is an EU country/region, then the new Tax registration number and your user ID are logged in the Tax Registration Log window. To verify a Tax registration number, you can choose the DrillDown button next to the Tax Registration No. field to open the Tax Registration Log window and then start the verification function. For more information, see How to: Verify Tax Registration Numbers.
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