It could get more complicated — and potentially more expensive — for Canadians to cross the border or send packages to the United States, if President Donald Trump’s executive order on tariffs goes into effect.Businesses that export products to the U.S. have warned that Trump’s plan for 25 per cent tariffs on most Canadian goods could lead to losses and layoffs. But it is the small print in the order and the way the U.S. government is instructed to implement it that could hit individual Canadians.The executive order that Trump signed on Saturday didn’t just levy tariffs on Canadian goods. He also…