I'd like user can choose where the form sending to by selecting between

I'd like user can choose where the form sending to by selecting between 2 or 3 submit buttons.

I want to put 3 submit button on the form and assign different emails to each button.

How can I dot it ?

Instead of using more than one submit button, you can create a conditional logic.

https://www.jotform.com/help/167-How-to-Send-Email-Based-on-User-s-Answer

Let us know should you need further assistance.