I have performed an update for Proseries 2020. However, proseries continues to show the due date for 1040/1041 as 04/17/2021. How to fix due date in order to EFile?

[TaxGuyBill]

Form 1041 was due on April 15th.

If something says the 1040 due date is 04/15, you should be able to just ignore it and e-file without any problem.

[Just-Lisa-Now-]

the due date showing in HB has no effect on Efiling. 

Maybe you need to elaborate on what youre trying to accomplish.