How long ago was the missed year? I missed a filing from 3 years prior, in which I was owned money, and got it back no problem. Also since I do my own taxes, so

How long ago was the missed year? I missed a filing from 3 years prior, in which I was owned money, and got it back no problem. Also since I do my own taxes, sometimes I make mistakes, and they correct them and I'm pleasantly surprised by a larger refund.