To qualify for an Obamacare tax credit, you have to estimate your household income for the following year in your application. You can base this amount on your most recently filed tax return, taking into account any changes you expect for the following year. When you fill out your application, you must use your "modified adjusted gross income" (MAGI).
For the great majority of self-employed individuals, their MAGI is the same as their adjusted gross income (AGI), which is shown on line 37 of your IRS Form 1040. (If you use the shorter Form 1040EZ, your AGI is on line 4.)
Your MAGI consists of all your income minus certain deductions.
To determine your MAGI, first add together all the following amounts:
You need not include: Supplemental Security Income, child support, food stamps, Temporary Assistance for Needy Families (TANF), gifts, workers compensation, Veteran's disability payments, cash withdrawals from savings, qualified withdrawals from Roth IRAs or proceeds from loans (like student loans, home equity loans, or bank loans).
To determine your final MAGI amount, subtract the following from your above total:
When you file your tax return the following year, you have to reconcile the MAGI you actually earned with the amount of credits you received. If you earned more than you listed on your application, you may have to pay all or part of your credit payments back to the federal government. On the other hand, if you earned substantially less, you may be entitled to additional credits.