529 Contribution Made In Error

I made a contribution to my 529 plan for my grandchildren in error.  I accidentally deposited $10,000.00 into their account and when I noticed that I had done that I directed my broker to sell $10,000.00 from the fund.  I now have a "loss" of $55.87.............how do I report this to the IRS using TurboTax so that I don't have a taxable situation?  Please help..........thanks.