I have a doubt regarding filling of Return Of income tax

kush (account) (47 Points)

17 June 2019  
assessment year 2018-19
I missed a entry of 200000/- as salary which was yet to be received but my company filed the tds for the full 400000/- which I was to receive for that year but till the end of year I only received 200000/- and the balance amount was received in next year now the problem is that I have claimed the tds which my company deducted for whole 4lac but in my return I declared the salary which I received in that year and I came to know lately that I can't even file revise return.
please help me out