"Extras" menu
When you create a new entry in the Daily Log, a "+" or "-" mark appears at the right end of the new entry's line in the Daily Log. A "+" indicator tells you that an adjustment has been applied to the net charges for that entry. The adjustment could be taxes, a markup or a writeoff amount.

The marker is also a target for changing adjustments to charges. You can click and hold the mouse on the "+" or "-" to display a popup menu that lets you add and remove taxes and markups, and change writeoff amounts. The popup menu shows tax categories that you have configured in TimeCache Preferences. Likewise, it displays markup categories you have created in the List Manager.

Other options
In addition to letting you change taxes and markups applied to entries, the popup menu also lets you start and stop timing,.

You can also use the popup menu to add (or change) a Writeoff amount to an entry, and to change an entry's Retainer status, and to delete an entry from the Daily Log.