I would like to know an alternative to using "itself" in this sentence, not forgoing the emphasis on today - which was added by including it.
"There is nothing that I have, which needs to be discussed today itself"
It is normal to use a sentence such as the above in India, but native English speakers might not agree.
In most English dialects, "today itself" would not be used in this way. Instead, if we want to be clear that we are making no assertion about the situation on other days, we'd say:
"... today specifically." or, "... specifically today."
There are some alternatives to specifically that could also do, both single words and phrases. Examples: '... that must necessarily be discussed today'; '... that can only be discussed today'.
However, most people would leave out 'specifically' altogether, and also simplify the sentence a bit.
I have nothing that needs to be discussed today
... and as someone commented above, you could also emphasise by replacing "today" with "this very day" (although that's a bit old fashioned).
