I cannot find how to file an amended return for this year. I am using Home & Business Desk top where is it?

With the 2023 tax return continued -

Click on Federal Taxes (Personal using Home & Business)

Click on Other Tax Situations 

Under Other Tax Forms

On Amend a return, click on the start button

You can also start the amend process from the home screen when you first start/open the desktop software.  There is an option for "Amend a Filled Return" in the bottom left of the screen.