Hi Felecia, welcome to the community! Have you checked out the sba.gov website? They have tutorials there for business plans.
We also have many previous discussions/articles along with our business module that you could view to give you more information.
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sba.com has excellent resources to help writing business plan. You should also look at business plans others have written to get good understanding of what is involved in writing a business plan and the content. Look at this link to get a detailed sample business plan you can study -