Actually, Diana, if you receive an Advanced Premium Tax Credit (reduced rate on coverage), you HAVE to file a tax return, even if there is no other requirement to file (e.g. no income). If you do not file a tax return, you are disqualified from receiving the APTC or cost sharing options in the following year. The IRS sent out over a million letters to taxpayers who did not yet file as of July.
I knew there was a catch...