Adding tax percentage to Total

Has anyone successfully written an API hook or JQuery string that they'd be willing to share to add tax percentage to the total field (or particular fields) in a form?

That would be EXTREMELY helpful!! THANKS!

Thanks for the input! but unfortunately I can't get that to work with my form. I can get the code inserted, changed the variables, and the 'user defined' box still shows up as $0.00 when submitted. Does it have to work in conjunction with paypal?

I really don't need Paypal to handle anything, I'm just gathering data for an order that will need to be reviewed and then processed offline with CCard info that is already on file. But, I need to give the client a total when they submit so they know how much their card is going to be charged, tax included.

http://www.speedypost.net/order-form if anyone has time to see what I'm building.

Hi Charles

Thanks for this snippet of code.

When I click the submit button after implementing this code, it does add a surcharge to the form.

However, if there is a required field not filled in and I click the button, it adds a surcharge to the total. If I continue to click the submit button, it adds a second, third, etc amount of surcharge.

Any way around this?

Thanks

I have a form here:
http://remingtontopsoil.com/order-online

This is used for cash or check orders only. I'm not using PayPal for this form. I need to add VA sales tax to the form. I need the tax to display before the Order total.

I followed the directions given here:
http://www.gravityhelp.com/forums/topic/add-surcharge-to-the-total-on-form#post-21670

However, the tax doesn't display. I don't see it included in the email I receive with the order. Is there another way to add a tax field to the form and have it display and be added in the Order Total before pressing the "Submit" button?

Thanks for your assistance.

Carl,

Thanks for your quick response. I followed these steps from David Smith's instructions to another user:

1. Add this code to your theme's functions.php file: http://pastie.org/1722092
2. On the first line of the code, update the '45' to the ID of your form
3. Go to your form admin and add a new product field to your form. Select "User Defined Price"as the field type and specify 'surcharge' as the CSS class. http://grab.by/9I23 http://grab.by/9I24
4. Make sure your form has a total field.

I added a new product field with user defined with CSS: surcharge, gform_hidden. Since I can't set it to calculate 5% sales tax, I want it hidden on the form.

When I fill out the form, this tax/surcharge doesn't appear on the email that I receive when I fill out the form. I have the order total but it doesn't include the 5% VA sales tax.

I'm not trying to use gravity forms for e-commerce. I have e-commerce on my site using PayPal and e-junkie. However I have customers that prefer to pay with cash or check. So I purchased gravity forms since it had the pricing fields and order total capability, to accommodate these customers. So this online form will be used only by customers placing a cash or check order.