Hello there, @sheinz.

I'll share a few insights about assigning classes to every line in a journal entry and guide you in sending product recommendations in QuickBooks Desktop (QBDT).

For the time being, the option to assign the same class to every line in a journal entry is impossible in QBDT. You'll have to manually select the same class or copy and paste the info to each line under the Class column. 

On the other hand, I can see how the benefit of being able to assign the same class to every line in a journal entry without copying and pasting the info on each individual line would aid you in managing your transactions with QBDT. With this, I would encourage you to send suggestions or product recommendations. We'll take them as opportunities to improve the various features of our products.

Your valuable feedback will be forwarded and reviewed by our Product Development team to help improve your experience while using the program. Here's how:

1. Go to the Help menu.
2. Choose Send Feedback Online.
3. Click on Product Suggestion.
4. Click on the drop-down for Type of Feedback and select Product Suggestion.
5. Select the Product Area.
6. Then enter your thoughts and suggestions.
7. Once done, select Send Feedback.

Also, you may want to check out this article as your reference to guide you in generating reports to compare the balances across multiple classes, departments, or locations using QBDT: Filter, sort or total reports by Class.

Let me know if you have other feature concerns or questions about creating journal entries and managing transactions in QBDT. I'll gladly help. Take care, and I wish you continued success, @sheinz.