If you want to change which account receives Telegram notifications, you'll need to first remove your Telegram username from the current account, then add it to the new account.
To change the address connected to your Telegram notifications:
Log in with the account that currently has your Telegram username registered.
Go to laso.finance/notifications.
Click the settings icon right above the Notifications title.
Clear your Telegram username from the field.
Click Submit.
You should see confirmation at the bottom that your Telegram username has been removed.
Log out.
Log back in with the account you want to receive Telegram notifications.
Go back to laso.finance/notifications.
Click the settings icon and enter your Telegram username.
Message the @LasoFinanceBot as described in the modal.
After completing these steps, your Telegram notifications will be sent to your new account instead of the previous one.