Adjustment for what exactly?

The standard deduction is increased depending on your filing status if you are age 65 or older.

Standard deductions for 2017 

• Single - $6,350 add $1,550 if age 65 or older
• Married Filing Separately - $6,350 add $1,250 if age 65 or older
• Married Filing Jointly - $12,700 add $1,250 for each spouse age 65 or older
• Head of Household - $9,350 add $1,550 if age 65 or older

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Uhhh...No, it is for a 2017 tax return.  See - <a rel="nofollow" target="_blank" href="https://www.irs.gov/pub/irs-pdf/f1040.pdf">https://www.irs.gov/pub/irs-pdf/f1040.pdf</a>

You are correct. I have deleted my comment.

It's on line 40 of form 1040 (or line 24  0f 1040A).
Instead of a $6350 standard deduction, you get $7900; a $1550 adjustment.
The numbers will be different if your filing status is Married Filing Jointly