The first thing you will need to do is enter in your correct login information to import your stores products. The import requires your email address and encrypted password, This can be found within import / export section of your store by clicking on Import / Export -> Volusion API. Click Run and copy the encrypted password found in the URL. Also make sure you are publishing the public product xml file.
Click on the checkbox to use inventory tracking if you have predefined inventory quantities. If this is not checked, all products are assumed to be in stock. Also, check import child skus to import your stores product options skus as separate listings in lieu of the main product listing. For example, if you sell motor oil, rather than just importing one listing for the motor oil, it will create a listing for 5w-30, 10w-30 etc.
Finally, you have an option to select the source of your product descriptions.