You can't, and you don't. TurboTax is for self-preparing a tax return. It is intentionally designed so that nothing can be entered in the Paid Preparer Use Only box, weather the preparer is paid or not. TurboTax has separate products for use by EA's CPA's and other entities that prepare taxes on behalf of others. One I know of is called Lacerte'. I forgot the name of the other one.
