Tied? Nothing needs tied, really. I think the POGs might need tied to a location but I'm not positive that it even matters.
Take a look through the inventory guide. It will have everything you have, plus seasonal/discontinued stuff from years ago. A ton of it is just extra. The main things to know are that you don't count anything in D260 (or D286, if you're also doing Food Ave) and that there is are two DPCIs for most syrups - one for the eastern half of the country and one for the western half - just scan the DPCI to see which one you have an on-hand count for, and count that one. Do the same for Icees and sodas because it's hard to tell which is which.
Also, know that this stuff is all store ordered, so the actual counts are 99% meaningless. You could completely skip the entire inventory and it would affect some reports and (on paper) it would look like your team stole a ton of stuff, but your team is ordering it, so you don't have to worry about getting shipped extra stuff (or not get shipped any stuff) the way that the rest of the store's on hands work. It's good to be as accurate as you can, but don't stress out about it. I forgot to count any pastries for the inventory 3 months ago and literally nothing happened and no one even noticed. You can estimate and round for any beverage ingredient; I used to fill out most of the TINV guide from home because I knew about how much we should have of each product.
The mugs and tumblers are the hardest ones to count because there are 10x more discontinued ones than there are active ones. There have been times where I just scan the label on the TINV sheet and enter in the count that it says we already have. This kind of defeats the purpose of doing inventory, but if you have a call off or are running out of time, this seems like a decent solution. It's unlikely to be off by more than 1 anyway, and usually it's exactly correct for any retail items.
Also, don't forget to check the TINV application on workbench. It'll ask you to enter counts of 0 for some things that you don't even have.