Analysis tookpak

[AAutry]

Trying to add Analysis tookpak. I go to File, then options. The only option showing is "Regional format settings" How do I access the "add-ins"? 

[#2]

Please provide detailed information. Excel version, is it Excel Online? Operating system? ... is Mac or Windows 10? Thank you for your understanding and patience Nikolino I know I don't know anything (Socrates)

[#3]

@AAutry 

This functionality is not available for Excel Online. In general it has limited functionality compare to desktop version.