Thank you for your question.
Auto-fill My Return lets you download the information already in your CRA My Account directly into your tax return. TurboTax then automatically transfers your data to the proper spots within your return. With just a few clicks, your tax return is filled with the most accurate and up-to-date information available, right from CRA. Using AutoFIll is completely optional.
To learn more about using AutoFill, please follow this link: https://turbotax.intuit.ca/tax-resources/auto-fill-my-return/index.jsp