Hello,

Income certificate that is issued after 01.01.2021 is only needed if it is applicable for the candidate appearing in the counselling, other required documents for EAMCET counselling are:
TS EAMCET 2021 Rank card
TS EAMCET 2021 Hall ticket
Aadhar card
Mark sheets of all classes from class 6 onward to qualifying degree
Transfer certificate from school last attended
Intermediate or its equivalent memo-cum- pass certificate
Income certificate (if applicable)
Caste certificate (if applicable)
Residence certificate of either of parents I'm Telangana for a period of 10 years in case if Non local candidates
Physically challenged  or children of armed personnel or NCC or sports or minority certificate if applicable
Residence certificate in case where the candidate has no institutionalized education

For more relevant information, you may visit here:
https://engineering.careers360.com/articles/ts-eamcet-counselling/amp



Hope this helps, all the best.