Return filing without payment of Tax

No   It Cannot be uploaded ,in my opinion it may show u  the error and wont upload

If it does upload, make sure that the self assessment tax is paid before due date. If it doesnt, you will have to pay first.

I think you can upload without paying it.

Yes it can be uploaded without payment of Taxes. The Only further step u'll have to take is:

1. Pay Tax

2. Revise your Retrurn.

and if you don't follow these 2 steps then you will receive a Demad Notice from The Income Tax Authorities when your Assessment will start.

Fully Agreed With Anrag Sharma

I m agree with Mr. Anurag

Yes, You can file the return and pay tax subsequently with applicable interests and  then file revised return within one year from the end of the Assessment year

a return filed without paying the self assessment tax as declared in the return is considerd as a defective return u/s 139(9). the asseessing officer will issue you the notice regarding the defect and u have to respond to it in 15 days. You can pay the tax in this 15 days period and it will render the return as valid.

The return will not be uploaded by the system, if there is an arrear of tax

RETURN CAN BE  E FILED  WITH  OUT PAYMENT OF SELF ASST.  TAX .

ITR V  SHALL SHOW  THE  TAXES PAYABLE  AS DUE

AS  IN THE RETURN ITSELF TAX  DUES  ARE  SHOWN  AS PAYABLE,   the same is beyond  the scope of  139 (9) (c)   and  hence  the return  cannot be declared  as defective.

 THE TAXES  CAN BE PAID  ANYTIME IN  FUTURE  WITH INTEREST  DUE.

SYSTEM  ITSELF  SHALL  GIVE  CREDIT  FOR  THE 140A PAID SUBSEQUENTLY.

If you cannot file without paying the tax, then for what do we have a column in all form saying "balance tax payable" before "refund"... i m sure it can be done and i ve done it several times...

Of course its better to file a revised return after paying the amount, but  i dont think its compulsory... the credit reaches the database automatically, and the non-payment is not a "mistake" of the assessee to be revised...