Takes only a few minutes. We do it in Deltaterm. I admit it is a tedious process as you must breakdown each individual tax charge and list it separately. But it gets processed as soon as I can roust a co-worker off the breakroom couch. We can only purchase ZEDs with a credit card, the refund goes back on the same card and usually shows up in 3 business days. So maybe technically it take more than a few minutes. I look at it as my card balance jumps up for a week or two then goes back down with the refund of unused tickets. Never costs a nickle more than the tickets I actually used. I understand that if we loose the actual paper ticket it must be processed by Delta and that can take longer.