There are two scenarios -
The first is if you reported those tips to your employer and they did not enter those tips on the W-2 you received. If that is the case then see this TurboTax support FAQ or what you should do - https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-forms/enter-unreported-tips/L0BGoGCZ...
The other scenario is if you did not report the tips to your employer. If this is the case then after you have entered your W-2 you will land on a screen labeled - Let's check for uncommon situations
Check the box labeled Unreported tips
This will allow you to report the tips received, have the income entered on your tax return and also pay the Social Security and Medicare taxes on the income.
Reported using Form 4137, Social Security and Medicare Tax On Unreported Tip Income
