Answer :  Before you can access to Accounting Settings, you have to update your roles. Refer step and figure below: 

  1. Go to Global Configurations > Users and click on Role Groups. 
  2. Choose which roles you want to edit if you have more than 1 roles. Click on Edit.
  3. After that, click on Accounting as picture below. After that, tick as #2, AUTOMATED ACCOUNTING. After done, please click SAVE

Once you have edited this role group, the user(s) related will need to logout and login back to the system in order to be able to see the updated settings.