When logged into the site go to 'My Employments' on the left hand side (3 lines in the top left hand corner if you are using the app on a mobile device) and select the employment you would like to view your payslips for.
Once selecting on your employment this will take you through to your latest payslip for that employment e.g 'Week 21'
If you have previous weeks payslips for that employment and would like to view these you will need to click on the black arrow pointing downwards that appears next to the week number or click on where it shows the week number e.g 'Week 21' and the drop down menu will appear.
You will then be able to see previous weeks payslips for that employment. You can then view the payslip as a PDF copy by clicking 'Download Payslip' in the top right hand corner (or 3 dots in the top right hand corner if you are using the app) > selecting 'Download Payslip' and then selecting which week you would like to view.