Rectification order claiming tax demand

You have revise ITR and claim the TDS in ass. yr. 2015-16.

Thank you sir.....but how can I revise my return for a.y.2015-16,as I already get income tax refund for last year,means now my assessment for a.y.2015-16 has completed know?...Also, even if I revise this return of a.y.2015-16, then what to do about this year's return i.e. for a.y.2016-17 in which I claimed this tds tax credit and cpc rejected as it is not reflecting in form 26AS of a.y.2016-17.

   when I first received notice, I submitted grivances and after that filed rectification request online giving only  details of tds claim of last year. then, cpc issued rectification order without considering my eligible tds credit of this year and asked me to pay demand of Rs.22,000 i.e. last years tds claim and this year's also valid and eligibe tds amount.

 what to do in such a case? again, I have to file rectification request or what other solution? please, guide.

Thank you sir.....but how can I revise my return for a.y.2015-16,as I already get income tax refund for last year,means now my assessment for a.y.2015-16 has completed know?...Also, even if I revise this return of a.y.2015-16, then what to do about this year's return i.e. for a.y.2016-17 in which I claimed this tds tax credit and cpc rejected as it is not reflecting in form 26AS of a.y.2016-17.

   when I first received notice, I submitted grivances and after that filed rectification request online giving only  details of tds claim of last year. then, cpc issued rectification order without considering my eligible tds credit of this year and asked me to pay demand of Rs.22,000 i.e. last years tds claim and this year's also valid and eligibe tds amount.

 what to do in such a case? again, I have to file rectification request or what other solution? please, guide.