Forgot to mention paid self assessment tax details in ITR-1 and received Intimation notice 143(1)

There are no details in my inbox. Can you please write here so it would help other community members also? 

Regards,

Hi,

What reason should I choose? And what is the amount I have to enter in this box?

After filed the revised ITR, the total tax liability has decreased. Earlier total tax liability was "Twelve Thousand" so I paid remaining amount to make it complete. 

After filed the revised ITR, 
Ex: 
Total Tax Liability = "Eight Thousand", Total Tax paid = 
"Twelve Thousand" ["Seven Thousand Five Hundred" (paid by employer) + "Four Thousand Five Hundred" (paid by e-pay)] 

Please guide me. 

Thanks & Regards,

"Four Thousand Five Hundred" (paid by e-pay) is the remaining about which I paid. 

Should I enter INR 4000/- in the box to not payable for the above reason? 

Because I got an intimation notice to pay INR 4500/- which I already paid but forgot to enter the details of the Challan while filing the original ITR.

After revised ITR file (I claimed one section), the total tax liability has decreased. So total tax liability was INR 8000/-, and total tax paid was INR 12000/-. 

INR 7500/- already paid by employer and extra amount was INR 500/- (This was deducted from INR 4500/-, which I already paid in the original through e-pay). 

So INR 4000/- should be refundable.