Currently the status of such a return is return filed u/s 139(4)
Note that its a belated return and not a defective return
You will prolly receive system generated notice stating that your return will be deemed to be defective return u/s 139(9) if outstanding tax is not paid within 15 days.
You can then file return in response to notice u/s139(9)
For rectification, you need to have demand notice, then pay the demand
[You can pay the tax with interest now and can show the proof lateron, this will save from additional interest liability due to further delay]
S.139(9)
Where the [Assessing] Officer considers that the return of income furnished by the assessee is defective, he may intimate the defect to the assessee and give him an opportunity to rectify the defect within a period of fifteen days from the date of such intimation or within such further period which, on an application made in this behalf, the [Assessing] Officer may, in his discretion, allow; and if the defect is not rectified within the said period of fifteen days or, as the case may be, the further period so allowed, then, notwithstanding anything contained in any other provision of this Act, the return shall be treated as an invalid return and the provisions of this Act shall apply as if the assessee had failed to furnish the return :