Subsidy Calculator To see if you qualify for the Federal Subsidy to pay a portion of your health insurance premium for 2020, use this helpful tool. http://healthreform.kff.org/subsidycalculator.aspx?source=QL You need to know your annual modified adjusted gross income from your 1040 tax form. For the 2019 tax year, please review line item 8b for the 1040 or 1040A. For the 2018 tax year, you can review line 7 for 1040, line 21 for the 1040A, line 4 for the 1040EZ, or line item 35 for 1040NR. When applying for premium assistance, you are trying to estimate what your AGI or MAGI will be for the current tax year so if you believe your income has changed, you may want to review prior year tax returns while adjusting for changes to your current income.