For United States individual income tax, adjusted gross income (AGI) is total gross income minus specific reductions. Taxable income is adjusted gross income less allowances for personal exemptions and itemized deductions. For most individual tax purposes, AGI is more relevant than gross income.
Filing Form 1040 with schedules B , C , E , F and accompanying worksheets puts my actual Tax basis at about 11 or 12 %.
Years back I could Fold my tax returns and put them in a business envelope in a file cabinet now I need a box(s). I could also do my own returns now an army of bean counters do them.