Does taking AP classes or any classes in general in one year or another make a difference in college admissions?

[skieurope]

@Plabem

Does it matter if I finish AP Bio and AP Chem in Sophomore Year or is there a difference in college admission if I take it in Junior Year/Senior Year/Freshman Year?

No. Although I would dissuade you from taking AP Bio and AP Chem concurrently. Just from a stress level, it would be better to split them up.

@Plabem

I’ll be taking MultiVariableCalc in 11th grade and Diff Eqs in 12th Grade can I receive credit for that or will I have to retake it in college

Depends on the college. An in-state public may give credit. A private college will generally not give credit. But some colleges, e.g. Penn, MIT, have internal challenge exams for credit. Other colleges eg. Princeton, Harvard, offer an advanced version of MVC for students with prior experience.