Dear Calvin,
1) If I resign in March 2013 after joinging in february 2013 can i claim gratuity?
You are eligible for gratuity
2) If yes, then which period will be considered for my gratuity calculation i.e whether june 2012 will be considered as last working day, or maternity leave of 3 months will be considered or february 2013 will be considered as last working day?
you will be eligible for 9 years gratuity provided you have been in continuous service for 240 day. But in your case Even though you have been in rolls for 1 year you are not working for 5 months(LOP) so you will be eligible for 8 years only. Many people are confused with maternity leave of 90 days it is actually 84 days. 6 weeks prior to delivery and 6 weeks after delivery. it is 12 weeks. 12*7 = 84 days.
So i dont think you would be working for 240 days in this year from feb 2012 - feb 2013.
If you are working for 240 days you are eligible.
3) I have 3months notice period which i dont intend to serve, in that case can the company deduct anything from my gratuity amount since i will not be serving 3months?
Normally when you are resigning the company will calculate alll your earning, gratuity, bonus/exgratia in Full & Final statement. so if there is any deduction they can deduct on the same.
No one can deduct your gratuity but when in F & F all the earning & deduction are made. the company can recover the money.