Hello student if your family annual income is less than 8lakh and you've not more tha. 1,000sqft Residencial land, not more than 5acre of agriculture land then you can consider yourself as EWS (economically weaker section) category student.

EWS category is not available in KCET application form you need to select your category on the basis of your caste.

If you're from reserved category like OBC, SC, ST you need to select your category, you can claim your category by submitting a valid category certificate.

For more details refer to the link mentioned below - https://www.google.com/amp/s/engineering.careers360.com/articles/kcet-reservation-criteria/amp

Feel free to comment if you've any doubt

Good luck