Answer:
Nareen's 2018 QBI deduction is $12948.
Explanation:
Schedule C profit                                  82520 Â
SEP (self-employed pension) plan contribution  (3500)
self-employment tax (50%*11660) Â Â Â Â Â Â Â Â Â Â Â Â Â (5830)
self-employed health insurance               (8450)
                                                (17780)
Qualified business income                            $64740
Qualified business income rate                         20%
QBI deduction                                      $12948
Therefore, Nareen's 2018 QBI deduction is $12948.