Hi, I have added some feedback score to your sandbox account. Can you try and see if the issue persists? Is yes, can you please file a support ticket with us at :
http://developer.ebay.com/signin?return_to=%2Fsupport%2Fdevelopersupport%2Fdefault.aspx. We will take a look at the issue and see what is happening. This issue is something to do with your Sandbox account . I would also recommend that you complete your business address in your sandbox account before reaching out to us. Cheers!!!
Hello, I think that is Premium Support. Please help there. Also, i have already completed my business account address and every things. But, i got same error i.e. "Before you can list this item we need some additional information to create a seller's account." Please help me there.