Since you live in New Jersey, then you may need Form NJK-1.
It appears that residency of partners as well as business activity in New Jersey could require Form NJK-1. See the Instructions for NJ-1065 Partnership Return and New Jersey Partnership NJK-1 beginning on page 7
Since you do not have this Schedule, the recommendation from the 2019 NJ-1040 Instructions is to enclose the federal Schedule K-1 and complete Reconciliation Worksheet A in GIT-9P, Income From Partnerships.
You may want to contact whoever prepared the Partnership to make them aware of the requirement.
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