Hello, daw14-sonic-net.
The option to send invoices directly from QuickBooks Online via text messages is unavailable. Instead, you can send your customer a transaction link via SMS to view their invoices from there.
Here's how:
- On the invoice screen, select the Save and share link.

- Click the Copy link button.

- After that, you can paste it into a text message or another messaging medium.
Your sales form layout can also be customized, allowing you to choose what information your consumer sees. Check out this article for more details: Customize invoices, estimates, and sales receipts in QuickBooks Online.
Feel free to add any details if you have any other invoice concerns. I'll be around to help you.