When the Tax Commissioner claims that a decedent was domiciled in this Commonwealth at the time of his death and the taxing authorities of other states make a like claim on behalf of their states, the Commissioner may make a written agreement of compromise with the other taxing authorities and the executor or administrator of such decedent that a certain sum shall be accepted in full satisfaction of any death taxes imposed by this Commonwealth, including any interest or penalties to the date of signing of the agreement. The agreement shall also fix the amount to be accepted by the other states in full satisfaction of death taxes. The executor or administrator of such decedent is hereby authorized to make such agreement. Unless the tax so agreed upon is paid within sixty days after the signing of such agreement, interest or penalties shall accrue upon the amount fixed in the agreement, but the time between the decedent’s death and the signing of such agreement shall not be included in computing the interest or penalties.