I'm a part time cashier at a Walmart and doing a tax exempt transaction is no harder than doing a normal one. You give me your tax exempt card (the one Walmart gave you when you registered your tax exemption with them), I enter the number and verify the name and then the transaction proceeds as normal. The only other difference is that you, the customer, have to sign the receipt at the end of the purchase. Now, WIC... that is time consuming...When I worked overnights at Walmart, new tax exempt accounts were covered on the first day as a cashier. Time consuming? Yes. Hard? Not at all.