You will need to obtain an EIN for the BC corporation however I wouldimagine a W8BEN is not appropriate for you if you are selling through AmazonFBA. The FBA program generally makes Amazon your agent in the US which meansany of your US source income ie anything sold to a US customer is taxable inthe US. W8BEN is asserting that you either have no US sourced income or thatincome is exempt under the USCanadian tax treaty. Based on the limitedknowledge I have of your situation but if you are selling through the FBAprogram I would say you donu2019t qualify to file a W8BEN but rather should becompleting a W8ECI and your BC corporation should be filing an 1120F toreport your US effectively connected income.