Assuming you need to know the journals for entering SMP...these are as follows:-
7000 DR Gross wages (inc SMP) 7006 DR Employer's NI 2210 CR PAYE & NI Ctrl 2220 CR Net wages 7011 CR SMP Reclaimed 7013 CR NI Compensation 2210 DR PAYE & NI Ctrl (with total amount of SMP reclaimed and NI compensation).
(Your codes may differ slightly).
The amount of SMP you are entitled to reclaim depends on the size of your business and the amount of Class 1 NI it pays. (Think it is £45,000 in the previous complete tax year to entitle you to reclaim 100%).