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I'm sorry, I don't understand what you mean.
What I meant was this:
Scroll to the bottom of your post
Click 'Edit'
In the field where your tags are (steemit, mindeffect, steem life, mindset), delete one. 'Steem' for example.
Then type 'introduceyourself' instead.
Save your post again.

I understood everything, thanks for the clarification. The problem is that I have a point in the name of the name. And the system can not put a dot in the tag. Without a point can put your name in the tag?