Provident Fund is normally the 12% of the employees salary. It is declared by both Employee as well as Employer side. In case of any manual changes, admin can go to PF settings.
For configuring PF in payroll, you have to add the predefined PF component from the different options given under the drop down of the Statutory Components of the Salary template, and there after it will be automatically calculated and deducted from employee salary and will also be included under 80C. Make sure to configure the payroll setting under Statutory Info in Control Panel -> Settings -> Payroll.
For configuring PF in payroll:
Navigate to: Control Panel -> Payroll -> Salary Template
Click on the edit icon of the respective salary template
Click on Next to get on the section of Pay components
Down scroll to come to the section of Statutory Components
Select the option from the drop down of the field
Select the Pay Frequency and the Visibility, click on Next to finish the processes
All the changes will be made instantly.