Generated a downloadable report just now, and I can share with you that the columns are as follows:
Transaction Date
Type (e.g., Order, Refund)
Sales Record
Number Order
Number Legacy
Order ID
Buyer Username
Net amount
Transaction Currency
Payout Date
Payout ID
Payout Method
Payout Status
Reason
Item Id
Transaction Id
Quantity
Item Subtotal
Shipping Cost
Seller Collected Tax
Seller-specified GST rate
Pay From Entity
Final Value Fee Fixed
Final Value Fee Variable
Very High "Item not as described" Fee
Below Standard Performance Fee
International Fee
Hope that helps. Let me know if you have more questions.