X0101 24F-2NT LIVE 0001547633 XXXXXXXX 333-185425 false false S-6 Invesco Unit Trusts Taxable Income Series 449 225 Liberty Street New York NY X1 10281 true 811-2754 333-185425 04/30/2022 0.00 347390.00 3842681.00 4190071.00 0.00 (4190071.00) 0.000092700 0.00 0.00 0.00 0.00 0.00 CRAIG S. FALDUTO Executive Director, Investment Research 05/25/2022