FILE - In this Aug. 21, 2014 file photo shows health care tax forms 8962 and1095-A, in Washington. As the April 15 tax deadline nears, people who got help paying for health insurance under President Barack Obama's law are seeing the direct effect on their refunds _ hundreds of dollars, for better or worse. With subsidies tied to income, consumers must accurately estimate what they will make for the coming year _ and that's been a challenge. Guess on the low side, get more help now with premiums, but owe money later at filing time. Overestimate income, expect bucks back from the taxman. (AP Photo/Carolyn Kaster)

Tax error complicates financial help for some with Obamacare

About 1.4 million households that got financial help for health insurance under President Barack Obama’s law failed to properly account for it on their tax returns last year, putting their subsidies at risk if they want to keep coverage.