To top up or move down, you simply need to make a new entry via Interchange or A2C using the relevant top up or move down entry code.
Please see the entry codes booklet for the relevant entry codes.
If the qualification you need to top up to is not the next size up, you need to top up to the qualifications 'in between' first.
For example, a student entered for the Foundation Diploma is now aiming for the Extended Diploma. You need to make a top up entry for the Diploma and then top up from the Diploma to the Extended Diploma.
The same principle applies when moving down.
If you make the entries via Interchange, you need to wait for each top up or move down entry to be processed. If you make your entries via A2C, you can include all the entries in the same EDI file.