If you are a seller and wish to change the PayPal account associated with your Twickets account, you will need to cancel the billing agreement with Twickets in the currently linked PayPal account. To do so, please do the following:
Log in to PayPal.
Click Settings at the top of the page.
Click Manage pre-approved payments.
Select the merchant's name or email address.
Once you have done so and try to list tickets again, you will be asked to enter your PayPal details. At this point, you can use the new PayPal account.