If a pass-through entity received income in a tax year that began before January 1, 2018, but after December 31, 2017 (i.e., a non-calendar year entity), the income is treated as though received or incurred in the year in which the entity’s tax year ends.
1 Therefore, these taxpayers will be entitled to claim the QBI deduction with respect to income received in 2017 if all other requirements for claiming the deduction are satisfied.