why is my standard deduction lower for 2019 than for 2018

Are you a dependent on someone's tax return?

Standard deductions for 2019

Single - $12,200 add $1,650 if age 65 or older
Married Filing Separately - $12,200 add $1,300 if age 65 or older
Married Filing Jointly - $24,400 add $1,300 for each spouse age 65 or older
Head of Household - $18,350 add $1,650 if age 65 or older

Standard deductions for 2018

Single - $12,000 add $1,600 if age 65 or older
Married Filing Separately - $12,000 add $1,300 if age 65 or older
Married Filing Jointly - $24,000 add $1,300 for each spouse age 65 or older
Head of Household - $18,000 add $1,600 if age 65 or older