ITR of married women

Yes she can file an ITR. 

Marriage may seem to exude a blissful promise of holy union, yet it comes with a barrage of responsibilities- first of which is tax filing. A taxpayer’s filing status for the financial year is based upon his or her marital status at the closing turn of the tax year. Thus, if you get married on the last day of the tax year, you are considered as married for the entire year.