Hi, If I unlink a bank account does it unlinks with all the transactions that I need?

Hello and Welcome to the Community, mydaveq-yahoo-co 🙂

All transactions that have been added/matched and show in the 'Categorised' section of the banking screen will remain when the account is disconnected. You can access these once the account is removed by going to Accounting > Chart of Accounts > Select 'Account History' beside the account.

Thanks!