If the Advanced time tracking add-on is already in use, the total and monthly work hour balances are displayed on the work hour entry form accessed through New > Work hours.
In order to start using the work hour balance, first request that all employees are up-to-date on work hour entries. Then, activate the Advanced time tracking add-on through Upgrades in the sidebar. Once completed, go to Tools > Settings > Time tracking options and set the terms for work hour entries. For more details on these settings, see the Advanced time tracking article. If necessary, the work hour balance can be adjusted for individuals through Tools > Settings > User management by editing a user, adding a work hour adjustment and saving.