Why doesn't my Amended State return calculate the refund I already received?

[k-johnston]

My Amended State tax return doesn't calculate the correct underpayment.

[Anonymous]

TT does not assume that the refund on the original return is correct. Therefore, you must enter the refund you previously received increased by any deduction for penalties such as underpayment of estimated tax, late filing penalty, etc. 

[fanfare]

@Anonymous  "Therefore, you must enter the refund you previously received increased by any deduction for penalties such as underpayment of estimated tax, late filing penalty, etc. "

Wrong.

Do not adjust your previous refund for penalties and interest in this manner.