You can adjust these numbers in the interview section under Inventory/Cost of Goods Sold. Search for schedule c and use the Jump to link. Click Edit next to your business and scroll down to Inventory/Cost of Goods Sold. Click Start or Update and go through the short series of questions.
Or you can edit them from the Schedule C Wks which is the form directly below the Schedule C in the forms list.
You can adjust these numbers in the interview section under Inventory/Cost of Goods Sold. Search for schedule c and use the Jump to link. Click Edit next to your business and scroll down to Inventory/Cost of Goods Sold. Click Start or Update and go through the short series of questions.
Or you can edit them from the Schedule C Wks which is the form directly below the Schedule C in the forms list.
I am also having this same issue. I am trying to amend a return from 2017 and I also can not edit these fields.
To edit cost of goods sold, go to the info page which lists all of the expenses, and edit Inventory.
This will take you to pages which allow you to edit beginning and ending inventory, and also purchases.