EDIT: Solved, thank you!

@XGreenIronFistX Assuming they are in your Inventory, there should be an option in the scratch menu that prompts you to use the Tickets (it should be an option without the AC icon).

Make sure they are in your inventory, go to the Shop Menu and choose to use your scratch tickets.

It's the same menu used for the FUN scratches, right? For some reason it even shows that I have 12 but when I select it I'm told I don't have sufficient AC.

@XGreenIronFistX it is an option midway down the menu. To use scratch tickets rather than AC.

Weird. For some reason it must not think they're in my inventory.

Ok I finally found it. It was under the recruit line tab for some reason.