It seems correct to me, assuming that you are a Swiss resident.
In this case, D2 is the option to tick, and I would fill the rest as
...... taxation of 0%
as agreed between Italy and Switzerland entered on ???
(I am not sure about the last field).
I would also add a comment saying "Art. 14" and I would attach a copy of the entire treaty (or just Art. 14) from here https://www.admin.ch/opc/it/classifi...index.html#a14
In case you are wondering what the article says:
1. says that the income of a Swiss resident which is self-employed or performing some independent activity, is subject to taxation only in Switzerland. Unless you have a stable workplace in the other state.
2. says explicitly includes scientific, artistic, and educational activities in this agreement, together with the activity of lawyers, medical doctors, engineers, architects, dentists, and accountants.