You'll be charged for your Refreshments membership in the second month, after your trial kit has shipped. You'll be billed on the last day of the month (unless you cancel or make changes by 12 p.m. PT).
You can locate your next billing date and how to make changes by going to IPSY.com and clicking on the Refreshments button (or by going to IPSY.com/refreshments). Scroll to the middle of the page and you'll find this:
Note: Refreshments is a separate membership from your monthly Glam Bag, so you'll see a separate charge.