Some of you may already know this but somehow I missed this until now. You can download a .csv files of your Etsy fees by month. It's a little hidden so this is how you find it.
  1. Go to "Your Etsy" and click the "Etsy Bill" link.
  2. From there click on "View Full List" (under the payment button next to "Monthly Statements). 
  3. That link will lead you to a list of your monthly statements. 
  4. Click the month you want to get the .csv for and down at the bottom of the page under the itemized list of fees is a link to download the .csv that you can then use for your record keeping.