3 vendors with single NTN (National Tax Number)

Hello Everybody,

I have a query regarding the National Tax Number of suppliers.

Some of suppliers have established their business with different names, but registered at Tax Authority with single name.

Now, I have question that how can I incorporate that scenario in Account Payable, while making payments to them? As the withholding tax will be deducted against each supplier, but with single NTN.

Thanks in Advance