Hi luker,
This permit is simply a certificate issued for a small fee by your state that declares you are registered to collect sales tax from your customers/buyers.
This license is needed -
* If you live in the USA or Canada. Most states have a sales tax, but there are a couple that don’t. If you reside in one of these states just let the wholesaler know and they may have a different form or requirement for you to complete.
* If you sell online to make money (i.e. You sell more seriously than just getting rid of a few old things from around the house every now and then). You need a seller’s permit so you can charge and collect taxes, which you’ll pay to your state government later.
* If you want to purchase goods wholesale from a US supplier (and you are also based in the US), you need a seller’s permit to buy wholesale sales tax free.
Occasionally you may run into suppliers who may also want to see a business license before they will sell to you. These suppliers will generally have large minimum orders and wish to determine that you are serious about purchasing their goods.
To get a resellers license you first have to enroll with your state tax department, which involves getting a Sales Tax ID number. Link hidden: Login to view
To get a reseller's license in Illinois, you can go to the Illinois Department of Revenue and to their website Link hidden: Login to view for complete information that you'll need. You can also call them at 1217782-3336 or 1800732-8866
And to get your Sales Tax ID number, in Illinois, here's a guide Link hidden: Login to view
And you can visit the State of Illinois Business Portal--Licensing website for information on small business licensing Link hidden: Login to view
Hope this helps. :)