Before importing into accounts make sure you have processed wages for all employees within the specified periods.
Navigate Home > Overview and click on the appropriate payroll frequency.
Select the appropriate period.
Make sure that all the employees in the period have had their wages calculated. Hit the 'Import into Accounts' button to transfer the payroll data into Clear Books.
Switch back to Clear Books Accounting using the link at the top of the menu.
Navigate to Purchases > Bills > Unpaid. Listed here should be a bill to your HMRC entity for the NICs and tax due. Also there should be an unpaid bill for each of the employees for their wages.