What do the codes mean in Box 14 of the estate Schedule K-1?

Other Information
A: Tax-exempt interest
B: Foreign taxes
C: Qualified rehabilitation expenditures
D: Basis of energy property
E: Net investment income
F: Gross farm and fishing income
G: Foreign trading gross receipts (Section 942(a)) *
H: Adjustment for section 1411 net investment income or deductions
I: Section 199A information
J: Qualifying advanced coal project property and qualifying gasification project property
K: Qualifying advanced energy project property
L: Advanced manufacturing investment property
ZZ

* Not supported

See the Schedule K-1 (Form 1041) instructions  for more info about these codes.