On 28 February 2023, Noxolo submitted her second provisional tax return for her 2023 year of assessment and paid an amount of R191 576.

She was 34 years old at the time. She estimated her taxable income for the 2023 year of assessment at R1 190 000 and used that estimated amount to determine her second provisional tax payment.

Her basic amount was R1 180 000.

Her first provisional tax payment was made on 31 August 2022 amounting to R189 000.

On 15 November 2023, she received her assessment for the 2023 year of assessment, which indicated her final assessed taxable income for the year as R1 670 000.

---Discuss whether Noxolo is liable for an underpayment penalty, as per par 20 in the Income Tax Act, regarding her estimated taxable income used for the purpose of her second provisional tax return.

---Assume Noxolo is liable for an underpayment penalty, calculate the amount of the penalty.