Janice Riddle got a nasty surprise when she filled out her tax return this year. The Los Angeles resident had applied for Obamacare in late 2013, when she was unemployed. She qualified for a hefty subsidy of $470 a month, leaving her with a monthly premium of $1 for the cheapest plan available. Riddle landed a job in early 2014 at a life insurance agency, but since her new employer didn't offer health benefits, she kept her Obamacare plan. However, she didn't update her income ... Now, she has to pay back the entire subsidy, which is forcing her to...