A partnership K-1 reports section 453(L)(3) information in Box 20 Code O :

Installment sale - 2020 deferred ordinary time share income

Installment sale ordinary timeshre income recognized on 2017, 2018, and 2019  derferred income

Total outstanding installment obligation.

Also, in Box 20 Code P:

Your share of the face amount of installment obigatios at the close of the taxable year

Your share of the deferred ordinary time share income.

Where do I enter this information in Proseries?