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There is a way to make an adjustment to your allocated tips, but you must be sure that you have an appropriate and complete log of all tips, such as a tip book, to substantiate the adjustments. 

This is more commonly done for instances where your allocated tips are based on sales but are less than what you actually received, rather than for tip-outs. 

However, the mechanics of adjusting the allocated tips in TurboTax are to adjust the box 8 number in the follow up questions after entering your W-2.  
 

You do not send any tip book/tip log that you have with your return but keep it somewhere that you can easily access it for at least 3 years in case the IRS asks you to support the adjustment.