You can do it easily if the two partners are
spouses and they are preparing their returns together. The best way to do this
is in Forms mode. Create the T2125 - Statement of Business or Professional
Activities for the one spouse, with all the amounts split. Then select
Edit>Forms>Copy/Transfer Form and click “Copy” to make a copy of the
T2125 onto the other spouse’s return. Then you can just edit the 2nd spouse’s
form where necessary. The main thing you will have to edit is the partnership
section, because on Spouse A the partner will be Spouse B (50%), and vice versa
on the other one.
If the two partners are not spouses, or the spouse are doing their returns separately, you can still
add a T2125 for each partner, but you can’t copy and paste. You have to type in
all the info for each person.