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Read onlydoes amazon will pay duties at customes or i will be receiving bill from customs when importing from pakistan
"does amazon will pay duties at customes"
WHY would Amazon pay your tax bill?
If I understand it -- you are not talking about shipping to Amazon -- you are asking about shipping to the buyer?
No buyer should ever be presented with any sort of customs or import duties or fees when they have ordered from their own counry's platform.
If any duties or fees are going to be assessed they must be prepaid by the seller.
No -- Amazon does not pay any of those fees.