Hi Vinita,
I have the same problem and I need the function to create several VAT registration numbers for one vendor.
This is a normal process for international business processes and with the new feature, MS is offering a solution, but it seems to be that this solution doesn`t capture this problem.
Different vendor numbers isn`t an option as it will crash other processes like MRP.
The new tax feature has a filter for VAT registration number but how can it be used or setup?