When annualizing withholding you must enter the amounts for all 4 quarters and they must total the actual withholding. Revisit Other Tax Situations -> Additional Tax Payments -> Underpayment penalties, answer Yes when asked if you want to Annualize Withholding, then make the necessary entries or delete all four entries. If any amounts are entered, all four must be entered even if the entry is $0 for a particular quarter.
