Hope you are doing good.
Sir, you need to elaborate your query. So that we understand better what you have asked. As far I have understood following are the information I can provide you.
>>Regarding IEC it’s really strange as some time custom asks for it sometimes they don’t. So to remain secure better you go for IEC for next couple of months. For IEC you need a current bank account.
>>>UPC code is unique product code which is provided by us. By using this code on Amazon seller central account you can list your product on Amazon.UPC is required for product listing and when you convert your stock to FBA that time Amazon provide you a label that needs to put on product carton.
You need one UPC for one product and it really doesn’t matter how many products you are selling it. You don’t need to print UPC on each product, you need to put label on barcode label provided by Amazon on product carton in which you sending stock to FBA. When you convert inventory to FBA and prepare to ship that time they provide you label.
Please do not hesitate to contact us or need call with Vikash sir, we can be of any further assistance. Thank you for choosing AMZ Blast!