This is ideal for employment income. To link the Self-Assessment to the Payroll module:
Go to the Self-Assessment dashboard of the client in question, select Income on the left-hand menu and then select Employment. Then click on the Link Employment button in top right-hand corner.
(You can also access this data by going to the Quick Access to Tax Return Forms on the Self-Assessment dashboard and selecting the SA102 (Employment) option).
Locate the correct profile within the pop-up page that will appear and then click on the Link button to the right-hand side.