Form 56 and Final 1041

My father's probate case is closing soon. I am his administrator and sole heir. I've filed the initial Form 56 and the first 1041. When probate closes, I will be released from my duties as administrator. That poses a problem with Form 56, since I would no longer have the court appointed authority to act on his behalf. I would still need to file the final 1041. Am I making this too difficult? You'd think that as his daughter and only heir, I would have enough of a fiduciary relationship to satisfy the IRS.