Outstanding demand set off aginst refund

go to your juridictional AO and ask for your demand order which give the bifurcation of demand raised by dept.it does not required any itr copy for that demand order

i had gone to it gept but they did not much more response...no any biferfication given by them

You may submit online response to outstanding demand by selecting disagree with demand. If the department is not co-operating you may file an online grievance on pgportal.gov.in to Department of Revenue giving entire details.