I received a 1099-G form AFTER I filed my taxes. What do I do?

I received a 1099-G form the day after I filed my taxes.  I don't usually get this form, so I wasn't expecting it.  It it is for a very low dollar amount, around $100.  What do I need to do?  Do I need to amend my filed return?  Or is this something I can correct next year?  Just not sure what to do...