My amended tax return has been "Completed" since June 24th and I have yet to receive anything in the mail. What do I do?

Where is it saying "completed"?  Did you efile the amended return successfully ?   Or did you print, ink sign and mail it in ?  Amended returns are taking 10 months on average to process so you have a long time to wait. 

I went to the IRS website and looked at the status of my amended tax return. Received in March, adjusted in June, completed on June 24th. I originally filed electronically via turbotax, then amended it through turbo tax as well. The federal taxes have all been electronic, but my state had to be mailed in. My state taxes are all good and I payed in what I needed to, I've just been waiting to hear back on my federal tax.