Hi to all. 

IRS on 1120-S instruction says : When To File
Generally, an S corporation must file Form 1120-S by the 15th
day of the 3rd month after the end of its tax year. For calendar
year corporations, the due date is March 15, 2024. A corporation that has dissolved must generally file by the 15th day of the 3rd month after the date it dissolved. 

If an S- Corp has been dissolved on 08/01/2024 when should file its 1120-S? 

And if no stock has been sold or any exchange not happened just S-Corp closed should file form 966?

And end date is the date of dissolved, am i right?

Thanks for help!