Glad to have you reach out to the Community again. Sometimes it's necessary to unfile your PST so you can make the appropriate changes. Helping you with unfiling the PST is my priority.
In order to unfile your PST you'll need to contact our support team using this link here. The reason is that the process of unfiling a filed a tax return is currently unavailable on your account. But don't worry, one of our agents will be happy to give you a hand with this so you can get back to doing what you enjoy.
In case you have questions, don't hesitate to leave a comment below. I'll be one message away. :)