American Space Commerce Act of 2020 This bill allows a special allowance for bonus depreciation for qualified domestic space launch property and extends the termination of such allowance until the end of 2032. The bill defines qualified domestic space launch property as property placed in service before January 1, 2033, that is (1) a space transportation vehicle or payload that is launched from the United States, or (2) other property or equipment placed in service to facilitate a space launch from the United States.