What does the error say?

When you complete the template, you need to save the file as .xls or .xlsx  I would use a simple name like Depreciation.xls

Then you would import that file https://proconnect.intuit.com/community/import-or-export-data-files/help/how-do-i-import-stock-trans... speaks about stock, but the same procedure

If you still have problems, contact support.