I'm using Online TurboTax and cannot reproduce your problem. I have a little blue edit pencil next to my business code. Business code and "method of accounting" each have their little blue pencil icon.
I don't know why you don't have the pencil icon. This is a long shot, but it's something to try. What if you click immediately to the right of the last digit, where the icon would normally be.
I don't know of another way to get to it, short of deleting the business and re-entering it.
You may wish to phone TurboTax Support to see if they can figure out why your pencil edit icon is missing.
FAQ: What is the TurboTax phone number?
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