Change A Button's Href

Hello All,

I had success the last time I posted a topic, so I am hoping that continues with this small little issue!

When one fills out the contact form, one is taken to a “confirmation” page with a “Continue” button. That “Continue” button, once clicked, then takes one back to the index.php page of the site. Let's say that I wanted to change this to something else…anyone know how I might go about doing that?

Thanks so much!