1040? 2020? Screen 5 > Client Letter > Due date

Due date of return [O]

Enter the due date of the return (in m/d/y format) to print on the client letter. If you leave this field blank, the program defaults to April 15, 2021. However, if the taxpayer is on extension, the program defaults to the extended due date. If the taxpayer is subject to underpayment penalty, late filing, late payment, or late interest, the program uses the date entered in "Filing Date (m/d/y)" (Screen 8, code 1).