Thank you for transitioning from one QuickBooks product to another, @Jay. You can assign one class to an entire invoice, and it'll be my pleasure to show you how.

Tagging a transaction with a class can help you easily track it. You can do this if you don’t need to track each product you sell by class. To start, let's change how you tag a class in your Settings.

Here's how:

1. Go to the Gear icon and select Account and Settings.
2. Select Advanced, then click the Categories section.
3. Press Track classes.
4. Tap the Assign classes ▼ dropdown, then select One to entire transaction.
5. Hit Save, then Done.

If you want to enter a class for each product you sell to a customer, you can switch back to One to each row in transaction anytime. You can learn more about this by reading this article: Track your transactions by class in QuickBooks Online.

Feel free to visit these resources to learn more about personalizing invoices and receiving customer payments:

• Customize invoices, estimates, and sales receipts in QuickBooks Online
• Record invoice payments in QuickBooks Online

Please let me know if you need further clarifications about using classes in transactions. I want to make sure everything is taken care of for you. Keep safe.