It depends on the age (over or under 65), marital status, and source of income (self-employment income over $400 incurs taxes).
See Tables 2 and 3 on pages 3 and 4 of Publication 501 to find out:
http://www.irs.gov/pub/irs-pdf/p501.pdf
$1900.00
100,000,000,000,000,000,000,000,000,000,000,000,000,
Generally if the dependent has gross income of $3,950 or more for 2014, they cannot be claimed as a dependent.
37,960 before taxes
$3000
$595.00
$1360 before taxes
£8.45 x 33 = £278.85.
The minimum income required to file US. income taxes for tax year 2009 depends on your age and what your filing status is: If single and under 65, you must file taxes if you earn $9,350. If single and 65 or older, you must file taxes if you earn $10,750. If married filing jointly, with both spouses under 65, you must file if you earn $18,700. If married filing jointly, with one spouse 65 or older, you must file if you earn $19,800. If married filing jointly, with both spouses 65 or older, you must file if you earn $20,900. If married but filing separately, any age, you must file if you earn only $3,650. If filing as head of household and under 65, you must file if you earn $12,000. If filing as head of household and 65 or older, you must file if you earn $13,400. If you are a qualifying widower with a dependent child and under 65, you must file if you earn $15,050. If you are a qualifying widower with a dependent child and 65 or older, you must file if you earn $16,150.
Unless you totally support her and she is your dependent you can't claim her on your taxes.
That is dependent on the rate of tax in question.
17,100 gross (before taxes and other deductions).