Can an invoice be sent as a text message instead of by email?

Yes, it is possible to send an invoice link via text, @mikesmobile1969.

We'll have to send the invoice link to your customer through your mobile phone number outside of QuickBooks Online. Here's how:

1. In your Invoice sheet, select the customer and enter the necessary fields like the customer email, and payment method.
2. Select from the dropdown menu Save and share link.
3. Select Copy link when prompted.

Please refer to the image below.
 

This article might come in handy for you in recording invoice payments: Record invoice payments in QuickBooks Online. 

You're always welcome to visit the QuickBooks Community again if you have any other questions about recording transactions. We'd be more than happy to help. Take care.