@SouthernCharmWreaths: This appears to be a recurring problem https://community.etsy.com/t5/Technical-Issues/Payment-account-s-quot-download-CSV-quot-is-giving-an...
I am having the same issue. How the heck am I going to do my taxes? This is unacceptable
@Shroomability This OP is over 5 Months old and the Technical issue involved was resolved.
I have just downloaded CSV from the Payment Account for 3 Shops and all worked successfully.
Try refreshing your computer etc.