You use the Tabs panel (Window > Type > Tabs) to set tab stops for a paragraph or type object.

You can access additional commands and options in the Tabs panel menu. To use this menu, click the triangle in the upper right corner of the panel.
Align the Tabs panel with a selected type objectYou can position the Tabs panel anywhere in the work area; however, it is usually helpful to align the Tabs panel with a type object.
Click the magnet icon
. The
Tabs panel moves directly above the selected text object, with the
zero point aligned with the left margin. If necessary, you can drag
the resize button at the lower right corner of the panel to expand
or reduce the ruler.
Snap tab stops to the ruler unitsBy default, you can position tab stops anywhere along the tab ruler.
Choose Snap To Unit from the panel menu or hold
down Shift as you drag a tab stop.
Change the units of measure for the tab rulerThe units of measure for the tab ruler are defined by the General units settings specified in the Units & Display Performance preferences (for all files) or by the units specified in the Document Setup dialog box (for the current file).