No, you won't be penalized. If you amend your tax return and will have some balance due, you have until April 15, 2019, to pay to avoid any penalties.
So - after you receive your refund(s) and when the amend feature is ready in TurboTax, please enter your 1099-G form and see. If your tax refund is affected, please amend. If the amendment results in no changes to your original tax return, there is no reason to amend.
Please read How to amend a return you already filed for details.