conversation: User (McHRSN): "So my fiancé is starting a part time job that uses 1099. We file separate returns. This will be her only source of income. So that she doesn't owe come tax time is some way to have taxes taken out or somewhere to send a % of her money to and if so how much? I know she can claim a few things like phone, and travel but what's the best thing to do here? \n\nEdit: she will make between 10-20k \n\nEdit: Thank you everyone!"
  Self: "Yes, she can send in estimated tax payments. \n\nWorksheet in Form 1040-ES booklet can help her estimate what her tax liability is. If she had no tax last year, she isn't required to send in estimated tax, but if she wants to avoid a big bill at end of year she can send in payments during the year. There are Payment Vouchers in that 1040-ES booklet, and address to mail them to. \n\nhttps://www.irs.gov/pub/irs-pdf/f1040es.pdf\n\nFor 20K of income all 1099, if she has no deductible business expenses\n\n1040 line 12 = Schedule C profit = 20000\n\n1040 line 57 = Schedule SE taxes = 20000 * 0.9235 * 0.153 = 2826\n\n1040 line 27 = deduct 1/2 SE taxes = 1413\n\nHer AGI would be 20000 – 1413 if no other adjustments. Then subtract 6350 as standard deduction and 4050 as personal exemption. That gives \n\n1040 line 43 = taxable income = 8187\n\nSo her income tax, since she is still in the 10% bracket, would be 818. And her SE taxes that support Medicare and Social Security would be 2826. Total is about 3644.\n\nIf she only earned 10000, then she would not have any income tax but would still have 1413 in SE taxes."
  