MN Ch 7 BK ?

I filed CH 7 in March 2011. Discharged months later. But after I filed & went through my BK my accountant said he could file from business losses from 2008 & we did so. Now for some reason, my returns of about $4k went to the trustee & she is saying she is entitled to some or all of this return. I filed solo but the old return is for my wife & I as we do our taxes jointly. What is the deal here? Is the trustee entitled to some or all of this return from 2008 that was filed after my ch 7 was discharged in 2011?