You will need to log into C-series as a user administrator with access to the administration tab in the user site. When looking to change bank details within C-Series, it is important to remember that there are two places where change need to be made firstly in your software and then in the files you are loading into the system.
For Bacs and faster payments the location can be found by browsing to: 'Administration' > 'Bacs/Faster Payments' > 'Application' > 'Edit' > 'Bacs'.
If you are using the Direct Debit Module can be found by browsing to: 'Direct Debit' > 'Admin' > 'Creditors'.
You will need to check with your accounts package to make sure your bank details have been updated in your data file, as if C-series is configured to extract your bank details from your data file they will override whatever account details you have set in the above steps.