Nothing much to it. Go to ATF.gov and request the forms. You complete, enclose a check, and deliver a copy to your CLEO. That's it. No fingerprint card, no schematics of your home's layout. In short order, you'll get your license and a FAT STACK of laws, rules & regs to read. When ordering from IL you'll need to send a copy of your FOID and a DL to most outfits you buy from/deal with along with a signed copy of your FFL-3. Some people/a few companies won't honor your FFL-3 for various reasons that amount to "cause I said so" and won't sell eligible C&R guns to you directly. I don't mind this at a LGS dealing face-to-face, but won't bother with folks (I refer to them as 'yahoos') who sell online but NOT to C&R's. Thankfully, these are few and far between. It's a very cheap license to have but you'll start spending and spending on things you never knew you needed before you had the type-3.