I know this is an old message but your advice was spot on. 

I just posted a question to the community to see if I can get that Tracking Number into a report. I want to make sure the products are shipped. I would like to see a report that has these columns

Invoice Date    Customer   Invoice Number  Product   Tracking number  Amount

But I can't see the other field that I have renamed Tracking # as a field I can add to a report