For calendar year 2021, the dollar amount used to determine the penalty for not maintaining minimum essential health coverage is 0 (2020 and 2019 also), per the Tax Cuts and Jobs act; for 2018 the amount was $695
The IRS routinely works with taxpayers who owe amounts they cannot afford to pay. The law prohibits the IRS from using liens or levies to collect any individual shared responsibility payment. However, if you owe a shared responsibility payment, the IRS may offset that liability against any tax refund that may be due to you.