The cost basis of the shares would be what you paid for them. You could divide the cost basis by the number of shares acquired to come up with a cost per share, then multiply that by the number of shares you sold in 2020 as listed on your 1099-B form and that would be the cost basis of shares sold in 2020.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
