If I have not paid any withholding tax, should I enter zero for both SS and Medicare if I'm the only employee of a S Corp. and need to issue myself a w-2?

This is the first time I've needed to take a "reasonable salary" with my business and I'm creating my w-2 using Turbo Tax Business Quick Employer Forms.  Since I've not yet paid any SS or Medicare taxes I entered zero but it responds with a audit warning prompt. Can I submit my w-2 with zero's for SS and Medicare?