The legend codes in the raster files of MapBiomas Amazonia Collection 6 are available in:

LEGEND CODES – COLLECTION 6.0 & LEGEND DESCRIPTION

LEGEND CODES – COLLECTION 5.0 & LEGEND DESCRIPTION

LEGEND CODES – COLLECTION 4.0 

LEGEND CODES – COLLECTION 3.0

LEGEND CODES – COLLECTION 2.0

LEGEND CODES – COLLECTION 1.0