When to Use Pentatonic Verse Major Scale Patterns

"When guitar soloing, how do I know when to use a pentatonic scale or major scale?"

As taught in Fretboard Theory, each chord, progression or song has a corresponding pentatonic and major scale that can be played over it. It's your choice whether you use one over the other or combine them. If you're trying to copy a song, then follow what the song does. Minor scales use the same patterns as major scales.