If you made estimated tax payments for 2018, did you remember to manually enter them into TurboTax? Otherwise, TurboTax would not have that information.
If you entered your estimated tax payments correctly, including the amounts and dates, TurboTax would have calculated any penalties you might owe.
This previous TT answer explains how to check the penalty section in TT: https://ttlc.intuit.com/questions/4650561-what-is-a-underpayment-penalty
**Answers are correct to the best of my ability but do not constitute tax or legal advice.