Hi, Jun-

Several places to look:
+ afni_proc.py creates a commented (!) processing script automatically, so you can look through that for the exact outputs of things you want.

+ as part of its processing, afni_proc.py commands including running an AFNI program called gen_ss_review_scripts.py to go through and look for certain outputs, and then make a dictionary of them. You can see a description of all important dsets/info that it currently looks for with:

gen_ss_review_scripts.py -show_uvar_dict

That will allow you to find what "keys" in the dictionary you would be interested in, and you can then look in the file created by that program for your specific processing, which will be called: out.ss_review_uvars.json.
You can then see what specific file was created for that "key".

+ you can look at the files in time reversed order:

ls -ltr RESULTS_DIRECTORY

and the largest files near the end are probably the processed time series you want: probably either errts* or fitts* files are what you are looking for (depends on whether you are performing resting state or task data, respectively).

+ This part of the help describes a lot of the outputs in detail:
[afni.nimh.nih.gov]

--pt