Time limit for submission of revise IT return

Since time limit for revision of ITR for AY 2018-19  (of 31/03/2019) is passed, you can only wait & watch if notice is received  under Sec 143(2) for understatement of income & then offer the income along-with TDS claim thereon in your response to such notice. But it is surprising that income was missed out in ITR (your post is silent on nature of this missed income), even though TDS was not reflected in Form 26AS, over which you have no control.