Do you have the election date entered as a date prior to he incorporation date?

Have you selected Short Year ?   If I recall that was someone else's problem with getting the election date to be accepted

I have tried every date but it won't take it.  The corporation was started in February 2021, and the client send to IRS after. But it just not taking the dates.

The actual corporation started in February 2021, and they sent to the IRS after that date. So I tried 60 to 75 days after, and it is still showing an error.

Thank you,

If the application was for 2021, use the same date as the incorporation date.

I try all of that, but I keep getting the error