Hi, peninsulahardwarenubeena. The option to switch to the old invoice layout is currently available to some users for a limited time. Once removed, you will no longer be able to return to the previous format. Since the new invoices automatically round to two decimal places, there is currently no way to add an extra decimal.
We recommend sharing your feedback with our product development team by selecting the Gear icon > Feedback in QuickBooks Online. Your input helps improve features for everyone.

Let me know if you have any other questions!