You can create a contract basis and then select it as an option on a post. A contract basis is an option that can be selected for a post in our HR system. It's a way to specify the terms or conditions under which an employee is hired. You can create and manage contract basis options in the system settings.
Create contract basis
Go to Setup and click on Settings.
Click on Module Settings and then click HR.
Select Contract Basis then click on Add Contract Basis.
Enter the new contract basis in the Description field and click on Save.
Select contract basis option on a post
Go to Admin Menu and click on Post Setup.
Click on the post you want to add the contract basis to.
In the Contract Details section, click on Edit.
Select the option in the Contract Basis dropdown list.
Click on Save.