Very few foods naturally have vitamin D. Fortified foods provide most of the vitamin D in American diets. 1  Fatty fish such as salmon, tuna, and mackerel are among the best sources.  Beef liver, cheese, and egg yolks provide small amounts.
Note: To contact a Seller requesting an invoice for an item Fulfilled by Amazon: 1  Go to Your Orders. 2  Click on the Seller's name, located below the item title. 3  Click on Contact Seller in More Information. 4  Fill out the information request form.
Step 4. Create your seller account. First enter a display name in the âChoose your seller display nameâ text field. Then read the terms and click the check box if you agree with them. Choose a credit card or use âAdd New Cardâ to enter a new one, which Amazon uses to validate your credit card.Step 5.ou'll have to pay a fee for the privilege, but you get several key benefits in return. For example, you get to take advantage of the Amazon brand, Amazon handle of payment processing and you can even have them deal with fulfillment by shipping your products in bulk to their fulfillment centers. Step 1.