Hello @Seller_vlHhcj9QXPcQ0,

To gain access to your seller account, try logging into Seller Central and click Didn’t receive the code? on the bottom of the two-step verification page. Select your backup method for receiving your code.

If you don’t have a backup device and can't change your settings, you'll need to go through the Two-Step Verification Account Recovery process. This process requires you to submit documentation verifying your identity.

Adam