Checkout issue, taxes, email

You're using a really old version of the view. No wonder that code didn't work.
The easiest will be to create a file templates/YOUR_TEMPLATE/html/hikashop_button.php and put the line of code below in it :

<?php function hikashop_quantity_render($html,$i,$max_quantity,$min_quantity){ return $html; }


It depends how the order was confirmed. If you confirmed the order manually, then, if you had the notification option to on an email was sent.
If the order was automatically confirmed by the payment plugin, then, an email was sent as well.

The address information is sent to paypal automatically. There is nothing to do. If you click on "I don't have a paypal account, pay with credit card" you should see your address in the form displayed by paypal.

What do you mean by "without registering" ? In the commercial versions of HikaShop, you can set the option "regsitration" to "no registration" in the checkout tab of the config. That will remove the joomla user account creation. The email and the address of the user will still be asked by the system. Is that what you're looking for ?

Could you give a link to your website so that we can test that ?
So far it works on all the websites.

It seems that you set the "customer address" option of the paypal payment plugin to "no address".

Do you use a recent version of HikaShop ?

Did you replace the YOUR_TEMPLATE with the name of your template in the path of the file ?

The second shipping is added by paypal because of your settings in paypal. You should turn off the shipping handling in your paypal settings:
www.hikashop.com/support/forum/4-how-to/...ping-issue.html#1147

Did you update to the latest version ?