A bill becomes law if signed by the President or if not signed within 10 days and Congress is in session. If Congress adjourns before the 10 days and the President has not signed the bill then it does not become law (Pocket Veto.)
Amounts paid. or reasonably expected to be paid during estate administration are deductible on Form 706; or, executor can elect to. claim some administration expenses on Form 1041 when paid. On Form 1041, expense is subject to 2% adjusted gross.
Just like personal tax returns, the estate or trust can report deductions on the 1041 for things like the payment of taxes and the fees paid to the fiduciary, which is usually the trustee or the person who administers the estate.