Can anyone give me tips or a website on how to do this?

If you’ve toilet trained your cat could you please give me your story or anything. Please and thank you!
Toilet the one we use! lol

My cat has been ********* on our leather sofa. My husband and I are in the process of cleaning it and airing it out. Once it is cleaned, are there any electronic training devices to keep her off the sofa?? I have done medicine without prescription research on the Tattle Tale and Pet Boundary, and did not find any good reviews. Does anyone have any suggestions other than getting rid of the cat?? She is fixed, and is not sick.