Penalty for late filing - Can I amend my dates?

I closed a business in 2020; I put July 20, 2020 in the ending date.  Now I learn that I get a late filing fee.  There was no activity in the business for the remainder of the year, can I file an amended return that changes the end date to Dec. 31, 2020 to avoid the penalty? (Its over $2400).

 

Also, If this is the best action, how do I do this in Turbo Tax?  It seems to not allow my to edit this item.