Thread is moved from Off Topic to the Site Discussion forum.
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Try this:
At upper right of any screen you're on, click your user name.
Drop down to My Timeline.
On the resultant screen, look on left side, toward top, for a dashed-line box.
The first line inside there should be "edit/add my entry"; click that.
On the resultant screen, look toward the lower right for text enclosed inside a little tab, "Edit Timeline".
Click that, update your information, save, and you're done.