Hello Aspirant,

Don't worry because now you cannot upload certificate on the place of your declaration of category certificate because you can upload it only once. There is nothing to be worry about because if you will be alloted a seat through JOSAA counselling then you have to show your caste certificate which should be issued after 01-04-2020 in the online verification of documents through alloted Institute.

For more details about JEE-Advance Application refer to the link given below :-

https://engineering.careers360.com/articles/jee-advanced-application-form

I hope this information helps you.

Good Luck!!