Problem 1-6 he Tax Formula for Individuals, Filing Status and Tax Computation, The Standard Deduction (LO 1.3, 1.5, 1.8) Marco and Tatiana are married and file separate returns for 2021. Tatiana itemizes her deductions on her return. Marco's adjusted gross income was $18,000, his itemized deductions were $2,400. Neither have any dependents. Table for the standard deduction Filing Status Standard Deduction Single $12,550 Married, filing jointly 25,100 Married, filing separately 12,550 Head of household Qualifying widow(er) 18,800 25,100 Click here to access the tax tables. Calculate Marco's income tax liability assuming the couple does not live in a community property state. X