If you received the entire sum and only a certain share belonged to you, then you need to report the shares that you received on behalf of others as nominee on your income tax return.
Essentially, your return would show a reduction (from the total) for the other shares. TurboTax does not support nominee distributions for certain tax reporting statements, including a 1099-S. However, it can be done in Forms Mode but only the desktop (installed) versions of TurboTax support Forms Mode.
