The deadline for filing a revised I-T return by an assessee is before the end of the relevant assessment year or before the completion of the assessment (whichever is earlier).
For instance: If an assessee files an I-T return for FY13-14 (i.e. assessment year 2014-15) on 10 July 2014 (due date for filing I-T return is 31 July 2014), however, later on discovers some mistake, then he can file a revised return of I-T anytime up to 31 March 2016 or before the completion of Assessment, whichever is earlier, for FY14.
An I-T return can be revised any number of times provided it is within prescribed time limit. Thus, in the above example, a revised I-T can be filed any number of times provided it is before 31 March 2016 or before the completion of assessment by the department, whichever event takes place earlier.
On filing of the revised return u/s 139(5), the original return filed u/s 139(1) shall be deemed to be withdrawn and substituted by the revised return. Revised return basically means that you have filed your I-T return for this year and want to make changes in the return which you have filed.
In case if the revised return is filed online, the assessee is required to furnish the 15-digit acknowledgement number of the original return. On receiving the revised return, the I-T department searches for the original return which is retrieved using the 15-digit acknowledgement number.
If you have made a mistake of not disclosing any income or have forgotten to claim a deduction in your return, you can file a revised return and avoid penalty exposure.
Under Income from house property-
Assessee can consider one of the house as self occupied, if the assessee is owing more than one house, and it is deemed that the assessee is earned income from the other houses even if those houses are not let out.
so in your case if houses are not let out, you can select one of the house as self occupied and you have to show income earned from the remaining houses as per the fair market rate of that area.