I was requested to change a tag, whatever that is, from COMMON to CALC, whatever that is, but I see nowhere I can edit my post.

I was requested to edit my post so that the TAG, whatever that is, should read Calc in stead of Common, whatever that is. Nowhere do I see a link to editing my post.

Tags are keywords appearing below the question title in little gray-background boxes. When you posted your question, you were required to choose at least on tag from writer, calc, impress, draw, base, math (to identify with which component you’re experiencing some difficulty: text processing, spreadsheet, presentation, …) or common (if the problem occurs an all components) or meta if your question is about the AskLO site itself.

Your other question should have been tagged calc and this one meta. But, there is no frowning or cursing against you because ergonomics of this site is not self-explanatory (to say the least) and could (should?) be improved in many ways.

To retag a question, click on the retag link just below the question description. You can now change the tags. To save the new choices, hit return while the cursor is inside the tags box. You may need to hit Return twice to record the edit.

To show the community your question has been answered, click the ✓ next to the correct answer, and “upvote” by clicking on the ^ arrow of any helpful answers. These are the mechanisms for communicating the quality of the Q&A on this site. Thanks!

In case you need clarification, edit your question (not an answer) or comment the relevant answer.

Follow the red arrow to find the edit link, which allow to edit your question.
Follow the magenta link to change the tags (retag) of your question