You don't have to calculate cost basis since the brokerages started reporting it several years ago. You just enter the total form your 1099-Bs onto the Schedule

You don't have to calculate cost basis since the brokerages started reporting it several years ago. You just enter the total form your 1099-Bs onto the Schedule D. There are a few cases (some crypto 1099s) where they tell you the basis on the statement, but don't actually send that to the IRS since it's not a security. In that case, you'd copy There are a few scenarios where the brokerage doesn't know the right basis though--examples would be a wash sale across two different accounts.