I am writing a research paper on Nathaniel Hawthorne's "The Scarlet
Letter." My topic is "The Scarlet Letter and Puritan Ethics and
Evils." What are some examples of Puritan ethics portrayed throughout
the story?

You can find about 122,000 websites by searching with

"the scarlet letter" ethics

Since I am sure that you have read the story, I should think that just
finding sites that discuss Puritan ethics would immediately help you,
and also point you to sources that you can use for your research
paper.