Hello @seemahundal,
As of that moment, there isn't an integrated way to assign a tag with every line item of your transactions.
But don't worry, I'll pass along your request directly to our product developers so they may include this feature for future enhancements.
On top of that, I've also included this reference so you can get the latest updates while working with us: The QuickBooks Blog.
If you have any other questions, please let me know by leaving any comments below. I'll be here to lend a hand.
