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

You can use If function Write in the cell where you want to input the date the following formula: =IF(MODIFIED-CELLNUMBER<>"",IF(CELLNUMBER-WHERE-TO-INPUT-DATE="",NOW(),CELLNUMBER-WHERE-TO-INPUT-DATE),"")