Yes, post-war would be correct.
Without a hyphen
It usually is, but is occasionally seen without a hyphen and spelt as one word
No, Sales, as a Revenue Account of the Income Statement, is a temporary account, which should not appear on the post-closing trial balance.
No, a hyphen is not needed.
without a hyphen idiot
No. Fully, when used as an adverb, is not followed by a hyphen. :)
I believe anything-American is hyphenated and the hyphen takes the place of ' and. '
There should be a hyphen in twenty-three.
You do not use a hyphen when writing square feet. Using a hyphen would make it one word which should not be the case.
Nah.
No, there shouldn't be.