Well if you get married and file a Joint return you get a much higher Standard Deduction. See the amounts for 2019
For 2019 the standard deduction amounts for line 9 are:
Single 12,200 + 1,650 for 65 and over or blind
HOH 18,350 + 1,650 for 65 and over or blind
Joint 24,400+ 1,300 for each 65 and over or blind
Married filing Separate 12,200 + 1,300 for 65 and over or blind
