Well if it is a Microsoft word document then you just go to the "Tables" tab or if you are talking about the tab key then you would Place the text cursor in the cell where you want to insert the tab character, using either the mouse or the keyboard. Hold down the "Ctrl" key and press "Tab" to insert the tab character. To insert more than one at a time, don't release the Ctrl key -- simply keep holding it and press "Tab" as many times as you need.
if it is a google docs document then you would also go to insert and then click table
This probably does not answer you question directly but this is how you do it