Yes, @MaryM428 is recommending adding one 1099-MISC with the positive $4,920 in Box 3 and then adding a second 1099-MISC with the -$4,920 in Box 3 to offset the income added by the first.
You can add a note with your response that the $4,920 was funds raised by others as donations to support medical and living expenses for your son etc etc.
