From Jan 8, 2016:
My response to an MTG PM asking about deductions:
How the heck is your vehicle involved in turking? lol.
HITs involving going somewhere in person are extremely rare. I have deductions for business vehicle use, but only because of other non-turking work I do. If you have specific detailed records of your mileage each time you drove somewhere for a self-employment-specific reason, as well as records of your car's total mileage through the entire year (odometer at start of year and odometer at end of year), you do get to deduct the IRS business mileage rate per mile ($0.575 per mile for 2015), which is much higher than gas costs, intended to cover the proportionate share of the eventual maintenance expenses those miles led to in the future. You don't get to deduct all your vehicle-related costs unless the vehicle is used exclusively for business purposes, and you have another personal vehicle to make that believable. If you had a ton of vehicle-related expenses, then you could deduct the share of them that is proportionate to the percent of miles driven for business vs non-business use (which includes personal *and* any W2-job commuting, those aren't deductible miles), but most people without extremely expensive vehicles are better off with the per-mile deduction than the percent of actual costs.
If you have a computer used solely for self-employment work (the vast majority of turkers do not), you can deduct its costs. But if it is mixed-use, then it has to be handled like the vehicle situation - you'd need detailed logs of how many hours you were using it for strictly business use, how many hours for personal use, and then deduct the percent of its costs proportionately. Likewise if you have a second internet service used only for self-employment work, you can deduct its costs, but mixed-use means you need the evidence for how much of its use was business vs personal.
I have a post in the tax thread that mentions some stuff about how the home office deduction works already... the vast majority of turkers don't qualify to legitimately take that either, because it has to be a strictly marked-off space in your home (as in, if it's not a separate dedicated room, you're supposed to literally make a line on the floor around it with tape) that is only used while you're working (where one might have a business-use-only computer, or else would be moving a laptop back and forth to a different desk outside of one's strict 'work hours') for self-employment purposes, and then one would get to deduct the percent of rent/mortgage payments and electricity bills proportionate to how many square feet are in that dedicated space vs the total square feet in your home. Home office deductions have been the trigger for quite a few people to get audited over the years, as they know most people working from home aren't working in an appropriately dedicated-use space (when auditing for that, they've made people send in photos and floor plans, or actually come look in person sometimes).
Student loan deduction is only for interest; your loan company will send you a tax form stating how much (if any) you are allowed to deduct for that each year. You can deduct qualifying education expenses up to $4000 per year, which includes tuition/fees and textbooks, but there's
some more complexities to read. Both of these are not the same kind of deduction as the other stuff mentioned above, though - they are only to reduce the part of your income, above the standard deduction and personal exemption amounts, on which you would owe actual *income* tax. The various hypothetical business expense deductions are to actually reduce what your taxable self-employment income is, on which you would owe both income tax and 'self-employment tax' (employer+employee's shares of Social Security and Medicare contributions).
If you're going to be earning that kind of money all from self-employment, you're probably going to owe several thousand dollars this time. And although you're not required to until you've had a second year in a row like that, you should probably go ahead and start making quarterly estimated prepayments (search inside the tax thread for 'quarterly', several posts about that too) ASAP if you plan on keeping on at that pace.