HOW CAN I WRITE 01 02 03 04 05 ETC. IN EXCEL. Click on a cell and type '01' in it !
Without any more specific INFORMATION, that's all the HELP i can give you.That is... you type a single quote before something that Excel MIGHT think something SPECIAL like a date or a number, to force the cell to "text" format
Type '00 to see 00 in the cell after you have moved away to another cell.