But according to this
Example 2.
You had a $500 underpayment remaining after your April 15 payment. The June 15 installment required a payment of $1,200. On June 10, you made a payment of $1,200 to cover the June 15 installment. However, $500 of this payment is applied first to the April 15 installment. The penalty for the April 15 installment is figured from April 15 to June 10 (56 days). The amount remaining to be applied to the June 15 installment is $700.
If I've paid my tax on June 10, the penalty is from April 15 to June 10 and not till end of June. But I've not found anywhere in TurboTax that allow me to enter this information
