Hi @gillyangelle,
Thanks for sharing the link. The form you have created is not the standard IdeaPush form. You must use the IdeaPush form for the idea to be created and assigned to the board.
If you are trying to use your own form, I guess you can do that, but you will need to work out yourself how to assign the idea to the right board. My suggestion would be to create an idea using our normal IdeaPush form, see how it gets assigned to the boards taxonomy and do the same procedure for your own custom form. Please see: https://developer.www.ads-software.com/reference/functions/wp_set_post_terms/ for more information on assigning a post to a custom taxonomy. I hope that helps.
Thanks ??