Drop Down Box

I have a drop down box populated with Coupons that can only be used once..

This is my form.

https://form.jotform.com/6002624043594

When they have been used I don't want them to be visible.  So other users can potentially use them.

Do you know a way of doing this in jot form?

Thankyou

The form seems to have been deleted.

However, your inquiry does not seem to be possible to do with jotform. You cannot delete the coupon code from the drop-down option once a user has used them.

Is there some way of tagging the line so the number will not show?

Are you still referring to the coupon codes?

If I understand you correctly, you want the coupon codes to only be used on a specific number of times. Is that correct? Here's a guide about how to add coupons: http://www.jotform.com/help/233-How-To-Add-Coupon-Code-in-the-Payment-Form 

You'll notice in the payment wizard that there's a coupon limit that you can setup, you can setup the coupon limit to be used as once.

Here's a guide on how to setup an order form: http://www.jotform.com/help/165-Setting-Up-Your-First-Order-Form 

I hope that helps.