To insert a checkbox in Excel, you have to enable the 'Developer' ribbon. To do this, go to the 'File' menu. Then click the 'Options' menu. A window will appear. Select 'Customize Ribbon' and check the 'Developer' under 'Main Tabs'. Then click 'OK' The 'Developer' ribbon is now enabled. Under the 'Developer' ribbon click 'Insert'. You now have the access to various developer options and tools including the 'Checkbox' button! Insert 'Checkbox' into your spreadsheet. Click and drag anywhere then start typing to name it and you're done!