When a Windows licence is activated, that becomes automatically associated to the Microsoft account used at the time, and there is no native process provided to move a Windows licence to another Microsoft account.
This forum is just a user to user forum, no-one here has any account access, the only hope you may have is to contact Microsoft Support directly, provide them with proof of purchase, and ask them if it is possible to move the licence for you, however, if you do not have access to the account you registered the licence to, then that will most likely not be possible.