Is it possible to connect payment options to the form?

Once they choose the details of their order... they then click submit but it takes them to a payment option(s).

Our send post feature allows you to pass form data to an external page. Check here: http://www.jotform.com/help/51-How-to-Post-Submission-Data-to-Thank-You-Page. 

What payment option are you trying to use? Let us know so we can also check and try it to our end.