mini, inc., earns pretax book net income of $1,324,000 in 2021, its first year of operations. mini recognized $128,000 in bad debt expense for book purposes. this expense is not yet deductible for tax purposes. mini reports no other temporary or permanent book-tax differences. the u.s. federal corporate income tax rate is 21%, and mini earns an after-tax rate of return on capital of 4%pute mini's current income tax benefit or expense.