If you are expecting a subsidy, take estimating your income seriously and adjust throughout the year as changes happen –  Obamacare took $729 bite out of tax refunds – H&R Block – Apr. 27, 2015

A majority of H&R Block clients who had received federal help to pay for their health insurance in 2014 saw their tax refunds reduced. Why? They had underestimated their income when they applied for premium tax credits.