Irs said I claimed a child as my dependent and that a social security number was not complete, that I made you much so they put my refund at 0.00 what do I do?

Irs zeroed out my refund said that I made too much that I claimed a child as a dependent that there were math errors which is impossible because turbo tax prepared my taxes I make less annually not more, I do qualify and I didn't claim a child, now they want my was to see what I filed, I think someone tried filing under my name, can you help me