I am having an issue with My account

Hello there, @Carcon.

I want to ensure you're able to manage your QuickBooks Online (QBO) account. Therefore, I would like to ask a few verifying questions. 

What do you mean when you say your sole trader account got closed when opening your second account? Did your account got cancelled, or you're unable to log in?

On the other hand, did you encounter an error while linking your bank to the new account? Any additional info will help me provide the appropriate resolution for your concerns.

Keep me updated in the comments below. Hope to hear from you as soon as possible. Take care and stay safe!