ITR1 - Where to show Challan 280 deposit amount

Once you have paid amount against outstanding demand, IT DEPT system will be automatically adjusted with outstanding demand.

The offline payment should appear in your Form 26AS on the CPC-TDS portal and also on the IT portal by 7-10 working days.Once it gets uploaded on the IT portal, the demand would be setoff against the payment. If the payment is not automatically uploaded on the IT portal for some technical reason, you can file a reply stating that the tax has been paid and give the challan details such as challan serial no, BSR Code and date of payment.The IT system will check the same and give due credit for the tax paid against the outdtanding demand.