You should not list Delaware as a location where you are "Also doing business in". You do not need to file a Delaware business tax return. According to the Delaware Division of Revenue:
Delaware Corporations:
Who do NOT Conduct Business in Delaware are not required to file a Delaware Corporate Income Tax Return, regardless if incorporated under the laws of Delaware.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
