Can additional self assessment tax be paid after filing return?

In one case, self assessment tax was paid and ITR-1 form filled up and submitted electronically on 31st July, 2012. Later it was realized that some amount was forgotten while calculating income tax and extra self assessment tax is yet to be paid. Can this be done now? In this case, if the dept accepts the revised return. should the person send two ITR-V forms (the first one, though incorrect, should carry signature to validate the submission and the final one also for the same reason)? Thanks for suggestions.

Is it true? loss from house property can’t be set off against income from salaries if it is not self occupied?

One of the income tax consultatants has advised me that the loss from house property can not be set off against the income from salaries if it is rented out. He says this provison has been with drawn in 2007 – 08. He says if the property is rented out, the loss arising out of it can be set off only against income from other sources if any & not against income from salaries as i will be claiming HRA exemption for the house i have taken on rent for my stay.