Customise ribbon/tabs

[jameey]

I have been tasked with updating a spreadsheet created by someone who has since retired. I need to access a custom tab at the top of the spreadsheet but it does not appear under the main tabs list in options and customise ribbon. Why doesn't it appear and how can I access it? Than you.

 

[Dryver14]

If it doesn't appear in the customize ribbon dropdown under Custom tabs and groups then there is obviously some sort of password protection, that I can't help you with,
Also try all the options under pain tabs on the menu on the right