Is it possible?

[JustAlilBit]

When I finish high school may I will be there.

[emsr2d2]

When I finish high school may I will be there.

What construction do you think " ... may I will be ..." is?

[JustAlilBit]

Then please correct it

[5jj]

Then please correct it

I can't. I don't know what message you wish to convey.

[JustAlilBit]

Okay I'll try one more time.
When I will finish high school then I will go to other city. Is ir possible now?

[5jj]

When I will finish high school, then I will go to another city.

[JustAlilBit]

When I will finish high school, then I will go to another city.

Can I replace will to "am going" ?

[emsr2d2]

Why I needed use "another" ? :)

Because "another" means "a different one to the one I am in now" or "a different one to the one we are currently talking about".

"Other" would be included in the phrase "the other" and would only mean one specific different city.

Why did you use the word "may" in your original if you meant "will"?

Edit: The question to which this was a reply appears to have been deleted.

[5jj]

It;s possible.

When I finish high school, then I am going to another city.

[emsr2d2]

I wouldn't bother with "then".

When I finish high school, I'm going to another city.
When I finish high school, I will go to another city.