Ben and Molly are married and will file jointly. Ben earns $300,000 from his single-member LLC (a law firm). He reports his business as a sole proprietorship. Wages paid in 2018 by the law firm amount to $40,000; the law firm has no significant property. Molly is employed as a tax manager by a local CPA firm. Their modified 2018 taxable income is $375,000 (this is also their taxable income before the deduction for qualified business income).

What is their tentative QBI based on the W2 Wages/Capital Investment Limit? (2018)

Determine their allowable QBI deduction. (2018)