Scan entire inventory for item with certain tag

So currently, I have an issue where if an item is enchanted or damaged, it won't unlock an achievement. But, I have potentially found a way to fix this problem by using tags. The problem is, there isn't any block of code, or way I know, to check to see if an item in the player's inventory has an item with a certain tag certain tag. I was searching for ways to do this when I came across iterating through the inventory. But everything I tried didn't seem to work, it didn't unlock the achievement, and the procedures didn't even run, and now I've hit a wall. If someone could help me, I'd be very grateful!

Thanks in advance.