For any commercial import, you must have access to WeBOC.
WeBOC is an online portal of Pakistan Customs, without WeBOC, you cannot import or export in Pakistan under your name.
To get WeBOC, you should have the following:
NTN
STRN (Sales Tax)
Chamber of Commerce Membership
After you meet the above requirements, you can apply for WeBOC.
PS: Before WeBOC, please do not pay any supplier. WeBOC requires the acknowledgement of the payment through Electronic Import Form, which is only possible after you are registered in WeBOC.
I hope this helps, if you are facing any trouble in registrations, you can contact us and our lawyers shall help you with registrations.