Hello @lill-britt.svensson,
My name is Alejandra and I am happy to assist with your inquiry, and appreciate you contacting LastPass Support!
I hope this email finds you well.If you wish to change the email associated with your account, follow these steps: https://support.lastpass.com/s/document-item?language=en_US&bundleId=lastpass&topicId=LastPass/change-email-address.html&_LANG=enus. The change is immediate and once the change finish you will be requested to relogin using the same master password but new email.
Kind Regards,
Alejandra
LastPass Tech Support
