Despite using the template provided by Sage (CSV for import) I keep getting the same eroor message 'Invalid Medical Insurance CSV record '1': The mandatory field 'PAYEREF' is missing or has an invalid data type , skipping record...' The format of the PAYEREF is exactly the same as last year and all other cells are in the same format of last year which I uploaded successfully. Can anyone offer some guidance as to what I can try next please
