The application applies any amount in this field to the first quarter for purposes of calculating Form 2220.

If the estimates were paid in equal amounts and on time, enter the total current-year estimates. This amount is applied equally to all estimated tax payments for purposes of calculating Form 2220.

The application proformas the estimated payments calculated in the prior year to the Calculated Amount fields. Enter X in this field to transfer amounts from the Calculated Amount fields to the Amount Paid fields.

The default date for the fifth payment is the same as the due date of the fourth payment. If you enter a date for the fifth payment, that date must be later than the due date of the fourth payment; otherwise, the application considers it paid on the due date of the fourth payment. If payments were made on time, enter the dates as the fifteenth of the month, even if the actual due date was later because of a Saturday, Sunday, or holiday.

The amount of overpayment calculated for Form 4466 is not the amount that prints on the corporate tax form.