Step 1: Go to left-hand side menu, click on "HR Manager" -> Payroll
Step 2: Go to right hand side and you will find filter button click on it and search for the users of which you wish to assigned salary structure.
Step 3: Move the mouse on profile icon and you will find edit option.
Step 4: Click on edit option and you can check salary structure in first field and yearly CTC below that.
Step 5: Click on salary structure drop down and select the salary structures you wish to assigned to that user.
Step 6: If you wish to change yearly CTC then add the yearly CTC in text box and click on save button.