TT is telling me I have an underpayment penalty. My total tax bill is $16,000. I paid $6,000 for each of the first 3 quarterly tax payments for a total of $18,000. Realizing I would get a $2,000 refund, I did not pay anything for the last quarterly payment. Considering that I paid 'ahead of the curve' with my quarterly payments, why is there a penalty?
Thanks,
