Hello from Amazon Selling Partner Support,

I understand that you want to close your account.

In order for you to close your account, go to Settings and click Account Info. In the Account Management section on the left hand side of the page, click Close Account. Fill in all the required fields and click Send to submit your request. We will then contact you for assistance. 

Once you finished, you will receive a confirmation email once your account has been closed, or an email detailing why your account can't be closed at this time and additional steps required.

Please also be reminded that here are the steps that need to be taken care of before you permanently close your account, you may follow these steps:

• Fulfill any outstanding orders. 
• Wait 90 days after your last sale to ensure the A-to-z Guarantee claims period is honored. 
• Wait until you have a zero balance in your account (your next disbursement or charge date). 
• Resolve all of your transactions with buyers, including issuing any necessary refunds. 
• Confirm that your bank account information on file is up-to-date to receive a final payment. 
• Check your Performance notifications to make sure that all the reasons for your account's suspension have been resolved and your account is restored.

Once you close your seller account, you will no longer have access to it. You can't view order history, process returns, issue refunds, respond to A-to-z Guarantee claims, or communicate with buyers. 

You can also terminate your account by accessing to this tool:
https://sellercentral.amazon.com/help/hub/solution/DA_CloseAccount2 

If you have further questions and information about closing your account, you may refer to the following help page below:

Close your seller account
https://sellercentral.amazon.com/help/hub/reference/G200399470