Can I add if/then logic to pick list printing?

[ShopifyUserTM]

Hello!

I am not sure if I am posting this question in the right place, so please let me know if I need to post it somewhere else.

I want to set up some conditional logic in our order/pick list process. The idea is to tag certain items to indicate that, if they are included in the order, two copies of the pick list will automatically print. If the order does not contain a tagged item, then only one will print.

I took a look at our order templates, but I don't think that is where I should be trying to change the code.

In order to do this, do I even need to change the code? 

If anyone can point me in the right direction for this, I would be so grateful!