Thank you for visiting the QuickBooks Community, swearuin. Yes, you can get back to the old invoice view or interface back in QuickBooks Online. I've got steps to help you achieve the process.

I recommend going to the Invoice page and you're able to click the Old layout option from there. Before doing so, please know that you may not be able to opt back into the new interface once you switch to the old one. 

Here's how to switch to the old view:

1. Sign in to your QuickBooks Online (QBO) account.
2. Go to the +New icon, then click on Invoice.
3. Click the Old layout in the top right corner. 
4. Choose the Switch layout button.
5. Select a specific reason that made you switch layouts.
6. Click Leave and submit.

Lastly, refer to this article if you need steps on how to record partial invoice payments in QBO: Record invoice payments in QuickBooks Online.

Please don't hesitate to post a reply on how this process goes and if you have any other concerns. I'll be here for you. All the best to you and your business, swearuin.