Tax and shipping
You may wish to add rules for tax and shipping. For this, your site integrates with mals-e.com. When using mals-e.com, the checkout process works like so:A visitor clicks the Buy button, like the one below.

They, see a non-branded page where they enter their physical address, and go to checkout.

On the following page, shipping and taxes are added based on rules you have created within Mals-e.com.

And the purchase is finalized with PayPal, or perhaps another processor depending on your Mals-e.com set-up.

Turn on mals-e.com checkout
Once you have signed-up at Mals-e.com, activate this option on your site like so:
Go to Site settings > Template > Advanced > Site preferences > E-commerce checkout, set this to Mals-e, and enter your Mals-e.com server name and user id below.
NOTE: Items sold via mals-e.com checkout must have the Title field populated in the image gallery.