@kathienitz You can turn off Jetpack testimonials by going into Jetpack > Settings. In the Content Types section, turn off the Testimonials option:

Let me know if this does the trick.
Kathryn, thank you SO much!
It did help but in a roundabout way. The testimonial option was already off … BUT by turning it on and then off again it made the testimonial option reappear on the left side of the dashboard. From there, I was able to go in and delete the three testimonials that were posted there.
This then resolved the issue. Thanks for your prompt support! Much appreciated!
You’re welcome – glad you were able to get it fixed up!
I’ll mark this thread as resolved but feel free to start a new one if you need help with anything else.