At compilation time, LaTeX does not know the maximum number of points for a given question. This could be quite simple to know when using simple scoring strategies, but with complex scoring strategies, this can be very hard to compute.
If you are using some simple scoring strategies, such as haut for multiple questions, you can consider writing a LaTeX macro:

\def\scoreHaut#1{ (#1 points) \scoring{haut=#1}}

\begin{questionmult}{color}\scoreHaut{2}
  Question...
  \begin{choices}
    ...
  \end{choices}
\end{questionmult}

The problem with that type of macros is that is dependent on the scoring strategy I'm using, and that I have to manually modify every question.

For example, if I want to change a couple of questions with default values, I can't use the same macro I need to use another one.
And if I keep changing it will become more work to keep track of the scores than put them in other places.

If LaTeX doesn't know the values in the first run, you can always use the aux files to compile it using several runs. Is that possible?

If LaTeX doesn't know the values in the first run, you can always use the aux files to compile it using several runs. Is that possible?

Not implemented yet, and not trivial (can lead to different values for different student copies, even for the same question), but possible.

I get your idea. Is there any internal variable that holds the scores for each question?
I would like to check it and thinker with it, if possible.

I checked the code (.sty) but is hard to move around without knowing the variables and the internal behavior.
Any help will be apreciated, or pointers to the documentation of how the code works.

No. Scoring strategies are simply logged by LaTeX to be used by AMC.
After a auto-multiple-choice prepare --mode b run (done when scoring (with the update marks scale ticked), the max scores for each question can be found in the scoring SQLite dtabase (in the data subdirectory of the project directory, see the beginning of the DataModule/scoring.pm file for details).