Retirement tax questions

I'm not sure what you mean by that last portion; what "other income?" Can you give me some possibilities? My situation is quite simple other than this IRA distribution; W-2, some small (less than $500) interest/dividend income I've reported. I don't even own property, and there's no way this income is pushing me into a higher tax bracket either. I'm stumped as to how this is taking away well over half my refund when I've included withheld taxes here.