If all your purchases were less than 12 months prior to proceed dates or they we’re all more than 12 months. I would just combine them for a total and using “various” for the purchase date.
if you have a mix of short and long term purchases and or any actual sales during the year. I haven’t a clue as to how to allocate the transactions.
Don’t have a clue what that cost factor number is for I had that reported to me as well.
if you had any actual sales, I found a spreadsheet to help with those calculations at:
https://support.wealthfront.com/hc/en-us/articles/4415890925972-How-do-I-report-taxes-for-GBTC-ETHE-...
Disclaimer: I’m just a guy on the Internet.
