You may have to disclose your salary on courts request....but not assets. You may but a villa worth 2 Crores...it may not be disclosed....
When you show your salary..you also in your petition show that.. you have other expenses...you show exactly what comes to your hand..after paying house rent, EMIs, Loans, parenents, conveyance,,,etc etc
If you have any property, you may transfer it you your brothers or any other close relatives name...
You may also ask your parents to file CrPC 125 against you...and ask for half of your salary...and you start paying then...just to keep in on record....
If they need to know about your assets or IT returns, they may file an application u.s 91 CrpC summonning the IT Commissioner to send the details of the your IT returns...
I again say ..do not disclose anything,...but your salary slip at the most..
Vikram