https://www.slab.org.uk/faqs/how-should-i-claim-for-multiple-deferred-sentences-on-the-new-online-system/
You must include all deferred sentences in every case regardless of whether a fee is being claimed.
The first or second diet of deferred sentence are automatically set at £0.00 (unless the SER box is ticked)and the system has now been set up to allow you to enter a £0.00 fee by answering ‘yes’ to ‘have you previously claimed for this?’
You must also advise us of all related reference numbers.