You fall within OBC non creamy layer

2) as per the Central creamy layer criterion II & III dated 08.09.1993 only the sons and daughter of following “government servants” will be treated as creamy-layer.

(i) Parents, either of whom is a Group-A officer. (Direct Recruitment)

(ii) Parents, both of whom are Group-B officers. (Direct Recruitment)

(iii) Parents of whom only the father is a Group-B officer and he gets into Group-A at the age of 40 or earlier.

2) in your case you would fall under OBC NCL as your father at age of 40 is class 3 govt employee

3) for government employees only their position in the office is the criterion for non-creamy layer status. Excluding all Class I employees and direct recruits of Class II cadre, all other govt. servants having income greater than 6 lakhs are still eligible for the OBC non creamy layer certificates

If you belong to OBC community then you are eligible for NCL certificate also.

Your father's salary income is not a criteria for determining the annual income, the salary income and income from agriculture is not taken into consideration for income limit beyond 6 lakhs per annum.

You can very well apply for the OBC NCL certificate with the jurisdictional revenue department

Since you have taken birth in Mumbai and your parents have been residing in Mumbai for plenty of years, you can apply in Mumbai itself.

1) you should apply from Maharashtra as you were born and brought in Mumbai

2) applicant family resides in Mumbai

You must write the domicile place in the blank that is required to be filled.

Regards