Can I sit Synoptic Assesment before studying Accounting Software

My training provider has provided me with the unit 'Work Efficiently in Finance' before the unit 'Accounting Software'.
My training provider has told me I can't sit the Synoptic unless I have done the Accounting Software unit, but I'm not sure if this is correct?
Can anyone tell me if I can sit the Synoptic Assesment before I've learnt the Accounting Software unit?