Position Property
Returns or sets the position of the specified tab stop, in points. Read/write Single.
Example
This example deletes all tab stops greater than 1 inch (72 points) for the text in shape two on slide one in the active presentation.
With Application.ActivePresentation.Slides(1).Shapes(2).TextFrame _
.Ruler.TabStops
For i = .Count To 1 Step -1
With .Item(i)
If .Position > 72 Then .Clear
End With
Next
End With