Now I found a solution for this issue. It seems that if one account has more than 100 of 1099Bs, the Turbo tax would only show one 1099Bs on 8948 forms. The solution is to create another investment account (you can put the identical institution name and account number) and move some of the 1099Bs into this account. As long as each investment account doesn't have more than 100 1099Bs, the Turbox Tax just work fine.
