2700 net salary with special tax status.

Hi,
I am going to get 2700 as my net salary with special tax status. Can I save more tax during return filing with any clause?
Also, My wife and 1 year old kid will be accompanying me. Can I live with family and save decently with this salary? Any guess on average cost of living for a family?
Any suggestions for housing, like indian localities. I will be working in Zaventem.

Thanks.

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