@ anil: actually, i first tried to file the application online. It asks for the corrected template. After furnishing all the details required, the page does not load. I tried it many times. But all in vain. Therefore, finally i chose to file manually.
@ sourav: There is no mistake in any tax calculation or anything. The problem is only this that i filed the amount of tax paid as Rs 216 but paid Rs 220 so department calculated as what it should be i.e. Rs 220. But, may be they checked the CIN according to Rs 216. therefore, they didn't find my challan and raised demand therof.