Tip allocation is only required when the amount of tips reported by employees of a large food or beverage establishment is less than 8% (or an approved lower rate) of the gross receipts (other than nonallocatable receipts) for the given period.
If the employees are reporting more than the 8%, or more, there would be no allocated tip amount.
The employer must still file
Form 8027 (PDF),
Employer's Annual Information Return of Tip Income and Allocated Tips. The employer is also still required to withhold and pay taxes with regard to all reported tips.