Over paid irs 3000.00 dollars. received refund already. how will this effect my state return? do I need to refile state.

[KittyM]

If you made an error on your Federal return, you may also need to amend your state return - especially if you may receive a refund as a result.  

If you're not certain it will change anything, you can calculate the amendment to find out.  It's free if you used TurboTax to file your return.

Here's how to Amend My Return in TurboTax.