Hi @shelly73
if I understand your question properly, unless you have selected "auto confirm new subscribers" your new subscribers will receive the incentive/confirmation email, and then after they have clicked on the link in that email, they will be directed to the Thank You page.
When setting up your form, make sure to click on "Send subscribers to thank you page" in the "Advanced Settings".
I missed that last point for awhile, so it may be possible that is the "missing link"
hope this helps!