What is the exact tax rate for my 1099MISC for manufacturer incentive payments? it seems off in my refund. IRS.Gov says its not subject to self employment or federal tax

from irs.gov
(1) are not treated as wages, (2) are not subject
to federal income tax withholding, social security,
medicare, or federal unemployment tax, and (3) are
not considered to be self­employment income and,
therefore, are not subject to self­employment tax.