if it is a single-member LLC or sole proprietorship, you complete schedule C for your 1040 to report the business income and expenses. You do not take a salary.
if your net self-employment income is over $400 you'll owe self-employment taxes of about 15% of the net. There is no way to avoid this. Since this is your only income you will owe no income taxes to the IRS but if you have a state income tax you may owe them.
considering your income is only 1500, does someone else provide your support. Turbotax will ask whether someone can claim you as a dependent regardless of whether they actually do. if you do not correctly answer this question this can cause issues with yours or theirs efiling.