They may want more than a tax ID. The reason for the tax id is to show that tax is being paid on a retail level and not there at the wholesale. That tax ID is turned over to the IRS to show who needs to pay tax on the items there weren't already taxed at the store.
The day pass you can get with your KCBS membership you pay taxes on the items you buy since you aren't reselling them as a food business would.
Picking it up and throwing it down on a Backyard Bomber MJH....