When did she turn 65? If a person is 65 or older by Dec31, 2018 they get an increase in the Standard Deduction. Are you filing Joint? Unless you are taking Itemized Deductions.
For 2018 the standard deduction amounts are:
Single 12,000 + 1,600 for 65 and over or blind
HOH 18,000 + 1,600 for 65 and over or blind
Joint 24,000+ 1,300 for each 65 and over or blind
Married filing Separate 12,000 + 1,300 for 65 and over or blind
