Pennsylvania Statutes Title 72 P.S. Taxation and Fiscal Affairs § 9139. Assessment of tax

After the appraisement has been made and the allowance or disallowance of deductions determined, the inheritance tax, as affected by the court's determination of the allowance or disallowance of deductions as provided in section 2138,  1 shall be assessed by the official with whom the return is required to be filed under subsection (f) of section 2136.  2 The assessment, unless suspended until audit, shall be made within one month after the filing of the appraisement or determination of deductions, whichever occurs later, and, if not so made, shall be made within an additional period as the court, upon application by any party in interest, including the personal representative, shall fix.