I have the steps where you can get the link, projectshopvilla.

When you're done creating the invoice, you can open it again and follow the steps below to get the link: 

1. Go to Sales > Customers.
2. Select the customer's name on the list. 
3. Find and open the invoice. 
4. In the Invoice page, click the drop-down arrow next to the Save and close. 
5. Choose Save and share link.
6. Click the Copy link button in the Send your customer a link to their invoice window. Then paste and send it via text or any other messaging platform.

Here's a sample screenshot for a visual reference:

I'm also adding this article on how to customize your sales transactions: Customize invoices, estimates, and sales receipts in QuickBooks Online.

For more questions related to invoices, or other concerns with QuickBooks Online, please add it on your reply below. Have a good day!