Importing Excel Sheet to Update Existing Smartsheet



I am trying to be able to create an Excel spreadsheet with corresponding header fields. For example, headers in Excel would be "Order #" and in Smartsheet it would also be "Order #" so that whatever is under those header fields would auto-populate into Smartsheet.

Whenever I try to import an Excel sheet it creates a whole new sheet, but I am wanting to add new information to my "Open Orders" Smartsheet multiple times a day.

Thanks for the help.