1040 line 12 is the Standard Deduction or your itemized deductions. Since the amount is less than the Standard Deduction you must be filing as a dependent or as Married Filing Separately? It's strange the IRS should be asking about line 12.
How much is your earned income on line 1 Wages?
The Standard Deduction for an individual for whom an exemption can be claimed on another person's tax return is limited to the greater of:
…..$1,250 or
…..Your earned income for the year + $400 (but not more than 13,850)
So you would get a minimum of $1,250 to a max of 13,850.
See Table 8 Standard Deduction worksheet for Dependents on page 26
https://www.irs.gov/pub/irs-pdf/p501.pdf
