Dear candidate as you can see according to new norms which is also updated on the jee advanced website it is clearly states that if you are unable to provide valid category certificate but still you have provided declaration then you would be counted under that mentioned category but during the time of josaa counselling you will be needed to upload a valid category certificate and if you fail to do that then your counselling would be done on the basis of your CRL and not on the basis of your category rank.

Hope this would help! Also you can visit jee advanced website in which this information is updated.