If you receive this error message whilst signing up to TahDah, you may have already claimed your account.
Go to https://rlssuk.tahdah.me/account/login to use the username and password you have previously selected to login.
Please ensure you have also checked your emails as you will have been sent a verification email, this email will include steps that must be followed before your account is activated.
If you have another account for a family member using the same email address please be aware that only one email address can be used per account.