Rural quota claim for seat in Kcet and verification of non creamy layer

Sir, To claim seat under rural quota in Kcet 2020 for my son. We Belongs to gereral category and we have Rural study certificate from 1st 10 th std of my son received from the school where he studied. Recently we came to know that with Rural Study certificate from 1st to 10 std, we must submit NCLverification certificate From Tahsildar that states candidate should not come under creamy layer for general merit.other wise we can not claim rural quota. After searching in some websites we came to know that parents of candidate should not come under creamy layer for General Category and parents income must be lees than 8.0 LPA, for consecutive 3 years, so, We applied for Income certificate and Non creamy layer verification certificate to concerned department.I am not any Govt. employee or Pvt. employee ( SELF EMPLOYEE HAVING OWN BUSINESS) and my wife is home maker and not in any Job. But out of my business profit and Interest earned from BANK FD's & Interest from SB A/c' and IT Returns filled, our Income from all sources for last three years is as below: 2017-18 :- Rs. 9.13 L ( Total Gross income) and Rs. 7.78 L ( total Taxable Income) As per ITR (both me and My wife) 2018- 19 :- Rs. 9.00 L ( T G I ) and Rs.8.13 L ( T T I) 2019-20 :- Rs. 7.97 L ( T G I ) and Rs.6.97 L( T T I ) and my Son Income SB a/c Interest for 2019-20 - Around 20 k ( not declared) So, we applied for certificate to the concerned department by submitting the last year ITR. 1. with Above income Details shall we get non creamy verification certificate. 2. will tahsildar consider All three years income must be below 8.0 lakhs 3. whether My son ( Candidate ) income is consider or not. 4.If we get Certificate, shall we can claim Rural quota in Kcet for seat allotment with out any legal dispute in future. 5. Is there any other legal law or Rules to claim Rural quota for kcet seat allotment, if we Ignored. We request your advice, so that this will help full us for my son future. Thanking you. Nagraj