Self tax paid but tax liability in assessment order

You can submit a request for online rectification by updating the above challan details.

https://www.incometaxindia.gov.in/Pages/tax-services/request-for-rectification.aspx

You can refer the above link for more details

If your tax liability is more than 10000 then you have to pay advance tax. Advance tax should be paid on or before 15th of Mar during that financial year. Unless it will attract interest u/s 234. You have to pay this interest along with your tax liable. So you have to pay the interest and response to outstanding demand

thanks for valuable replies, i have to pay balance tax and submit response to outstanding