You'll only see columns A:IV if you open the workbook in compatibility mode.

Save the workbook as a normal workbook (*.xlsx or *.xlsm) and then close the
workbook and reopen it. Then you'll see all 16k columns.

Adding Columns wrote:

I'm exporting data from QuickBooks which goes beyond Column "IV" in Excel
verison 2007. Is there a way to set-up Excel to increase the columns?

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Dave Peterson