III Hom Derick and Delores tie a joint retum. Derrick eamed 533,000 during the year before losing his job. Delores received Social Security benefits of $6,000. Requirements Determine the taxable portion of the Social Security benefits What is the table portion of the Social Security benefits Derrick eamed 545,000? b. Requirement a Determine the taxable portion of the Social Security benefits Begin by computing the provisional income. Only select items that are applicable to Dan and Diana. (Leave unused input fields blank, do not select a label or enter a zero.) Plus Provisional income