I have 12 months worth of previous year's data in Excel (January-December)
but only want to graph certain months data. Not sure how to explain this. If
the current month is October, than I want to pull data from January-August;
if current month is December, than I want to pull data from January-October.
Does anyone know how I can do this with a formula? I've exhausted my limited
knowledge and not had any success.

Thank you!
Jani