a spell from a scroll is always a fixed level
Effects of Metamagic Feats on a Spell: In all ways, a metamagic spell operates at its original level even though it is prepared and cast as a higher-level spell. Saving throw modifications are not changed (unless stated otherwise in the feat description). The modifications made by these spells only apply to spells cast directly by the feat user. A spellcaster can’t use a metamagic feat to alter a spell being cast from a wand, scroll, or other device.