I'm not sure if I like this new format. I can't enter invoice number manually. Can anyone offer suggestion?

Hello there, ronald.

First, let's make sure you turn on the Custom transaction numbers feature by going to Account and settings. This way, you can control the sequence. Let me show you how to do it:

1. Click the Gear icon and select Account and Settings.
2. Go to the Sales tab and click the Pencil icon in the Sales form content row.
3. Toggle the Custom transaction numbers button to turn it on.
4. Click Save, then Done. 

Once done, you can now manually add the invoice number, and QuickBooks Online will remember the number and continue the sequence. 

Also, I've added this article for more details: Add custom transaction numbers to sales forms in QuickBooks Online.

In addition, you can check this article to learn how to receive and record invoice payments in QuickBooks Online: Record an invoice payment.

I'll keep an eye out for your reply. If you have other concerns about managing your invoices in QuickBooks Online, feel free to include them in the comments. We're here to assist you 24/7.