I redeemed a business product key on the wrong account and need it moved to my correct account.

Hi,

If the product key has already been redeemed, the license is normally associated with the account that was used during the redemption process and cannot be moved to a different account through a self-service option.

You can learn more about how product key redemption works here: Using product keys with Microsoft 3655

If this is a Microsoft 365 Business subscription and you have administrator access to the tenant, you can open a support request through the Microsoft 365 Admin Center. The following article contains the steps:

Get support for Microsoft 365 for business

The support team can review the redemption details and determine whether any options are available for your specific situation. Please note that license transfers are not generally supported once a product key has been redeemed, but Support is best positioned to advise on any available exceptions or next steps.