Do I have to sign where it says PAID PREPARER if it was self-prepared on turbo tax

No, you sign as taxpayer, in the place that says Sign here not paid preparer.  Paid preparer refers to someone else who prepared your return and received payment from you for the tax preparation.

If I prepare a2019  Form 1040 for a friend using turbo tax but I am not being paid do I have to sign as preparer?

No.  And if you use Turbo Tax it is a self prepared return and you can't fill in a preparer name.  You are just helping them.