As Mike said, the only purpose of that question was to estimate your income to determine how much "Advance" credit they would give you (column C of the 1095-A).
However, one feature of the new law that passed last week means that for the 2020 tax return you do NOT need to repay any of the Advance credits that you received. So if your tax return is showing a repayment, WAIT to file the return until TurboTax updates its software to reflect that portion of the new law.
