Excel Formula which places date/time in cell when data is entered in another cell in the same row

Question

Hoping there is a way this can be done with a formula since I will be putting this on SharePoint as a shared workbook.

Column B contains Tasks, while Column E cont

Answer 1

This can be accomplished with a simple VBA function. Excel has support for a Worksheet Change Sub which can be programmed to put a date in a related column every time it fires.

Private Sub Worksheet_Change(ByVal Target As Range)
    If Target.Column = 2 And Target.Offset(0, 3).Value = "" Then
        Target.Offset(0, 3) = Format(Now(), "HH:MM:SS")
    End If
End Sub

A quick explanation. The following "if" statement checks for two things: (1) if it is the second column that changed (Column B), and (2) if the cell 3 columns over (Column E) is currently empty.

If Target.Column = 2 And Target.Offset(0, 3).Value = "" Then

If both conditions are true, then it puts the date into the cell in Column E with the NOW() function.

Target.Offset(0, 3) = Format(Now(), "HH:MM:SS")

Range.Offset

Range.Column