If you find that Entitlements are not calculated for an Employee when doing a payroll entry, the most common reason behind this is the number of hours have not been set for the employee’s base pay item (wages and salary). Have a look at the following screen shot;

You may expect the number of hours for the pay period you have entered in Employment Details above to be taken into account when calculating the entitlements, but this is not the case. You need to set the number of hours for the base pay item in either default pay or when you are doing the payroll entry, as shown below.

When you do a payroll entry for the employee next time, you would be able to see the Entitlements have been automatically calculated, as demonstrated in the screenshot below;