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Yes, you must file both.
See Mass Courts Standing Orders: http://www.mass.gov/courts/case-legal-res/rules-of-court/probate/pfc-orders/2-09.html
"A Conservator may be required to file a Conservator Financial Plan for managing, expending and distributing the assets of the estate. G. L. c. 190B, § 5-416(c) . Whenever any Guardian of the estate or Conservator is before the Court, the Court may order the filing of a Conservator Financial Plan."