SAO PAULO—Amazon.com Inc. is struggling to ramp up its operations in Brazil, a promising market that so far has proven difficult for the world’s largest online retailer to crack, according to nearly twenty people with knowledge of the situation.
Challenges include the nation’s tangled tax system, complicated logistics, and testy relations with some prominent vendors, who say the Seattle behemoth has shown little flexibility in negotiating even though it is still a minor e-commerce player in Brazil.
