After you file

Please clarify something first.

What did you mean by this statement:
" I do have 2018 in progress with turbotax but have decided to use a CPA due to a job change. "

Does that mean a TurboTax CPA as part of your current product or an outside CPA?    Does that mean you don't intend to use TurboTax to prepare your 2018 return, or does that mean you intend to use TurboTax for 2018 but want the TurboTax CPA help that is in your Live Basic product?   If you intend to keep using TurboTax for the 2018 return and the TurboTax CPA, then you don't need to clear and start over.  You can just pay for the Live Basic to unlock the return.

My answer below gives you both options, so you can choose whether to continue and pay for Live Basic or starting over in Free Edition and paying for PLUS.