Hi there, jon126. Welcome to the Community.
Sending invoices via SMS (text message) is not available in QuickBooks Online. However, you can copy the invoice link and paste it, and send it to your customer via text message.
Here's how:
- Go to your Invoices.
- Choose the invoice you want to send via text message.
- Next to Review and send, click the drop-down menu.
- Hit the Share link.
- Click on Copy link and then Done.
- Paste the copied link into a text message to your customer.

Regarding the visibility of sending an invoice via SMS on your end before, I recommend reaching out to our customer service team for further assistance.
Here's how to contact them:
- Log in to your QuickBooks Online account.
- Click on the Help button located at the top of the page.
- Navigate to the Search tab, enter your query, and press Enter on your keyboard.
- Select Contact Us.
- Under the Callback option, click on the Have us call you button to input your details.
- Finally, choose Get a Call to receive a callback from support.
To ensure availability for your assistance, kindly note our business hours.
Please feel free to return if you have any additional concerns. We'll provide prompt assistance.