Invesco Unit Trusts Taxable Income Series 640: 24F-2NT filed Sep 25, 2023

Name: Invesco Unit Trusts Taxable Income Series 640 24F-2NT (0001528621-23-001385)
Creator: Invesco Unit Trusts Taxable Income Series 640
Published: 2023-09-25

Form type: 24F-2NT
Filing date: Sep 25, 2023
Accession number: 0001528621-23-001385
Filer: Invesco Unit Trusts Taxable Income Series 640 (CIK 1686060)