Answer:
From 2018, there is a threshold limit of $250,000 defined by IRS for single:
(a) Tim has an excess business loss:
= Business loss - Threshold
= $350,000 - $250,000
= $100,000
(b) Tim may use $250,000 of the $350,000 LLC business loss to offset non business income.
The excess business loss is treated as the portion of the Tim's NOL carry forward.
Excess business loss of $100,000 will be treated as the NOL carryforward to subsequent years.