Are you looking at/for this:

https://www.state.nj.us/treasury/taxation/2020-cbt-returns.shtml

"The 2020 Corporation Business Tax returns (Forms CBT-100, CBT-100U, BFC-1, BFC-1-F, and CBT-100S) are currently in the process of being updated to incorporate the new law's changes, which is delaying the start of the filing season."

https://www.state.nj.us/treasury/taxation/prntcbt.shtml

"Corporation Business Tax Reform. P.L. 2018, c. 48, and P.L. 2018, c. 131 made significant changes to the Corporation Business Tax Act. The Division is in the process drafting information regarding these changes. Information will continue to be posted as it becomes available"