Paragraph.TabIndent (Word)

Sets the left indent for the specified paragraphs to a specified number of tab stops.

You can also use this method to remove the indent if the value of Count is a negative number.

TabIndent (Count)

Count: The number of tab stops to indent (if positive) or the number of tab stops to remove from the indent (if negative).

ActiveDocument.Paragraphs(1).TabIndent(2)