Finding new upgrade hard to navigate

I wish I could make it better, roblaneaircon.

Our Product Development team is continuously improving the QuickBooks Online app. In the meantime, I'd recommend accessing your account via a browser. From there, create an invoice. 

Here's how:

1. Sign in to your QuickBooks Online account.
2. Go to + New and then select Invoice.
3. From the Customer drop-down list, select a customer. 
4. Add the necessary details.
5. From the Product/Service column, add the items.
6. Enter the quantity and rate.
7. Click Save and close.

For more details, please see this article: Create Invoices in QuickBooks Online.

After that, you can track the payment once the customer pays you.

I'm only a few clicks away if you need assistance recording and managing your sales transactions. It's always my pleasure to help you out again.