Practice - 4.2: Determine whether you need to file a federal i... Q4.22: Kris, who is 17, earned $3,000 last year from investments. If his parent's marginal tax rate is 24% (as well as the federal trust rate) and Krisis in the 10% tax bracket, how much in federal taxes will be owed on this income? A $3,000 at 10% B$2,200 at 10% plus $800 at 24% $1,100 at 10% plus $800 at 24% D$3,000 at 24%