I would like to prepare another person's return with my Intuit Account. How can this be done?

I signed up for an Intuit Account several years ago. I prepare my son's taxes each year. I used to prepare mine and my husband's. However; when his mother passed away, we had a professional prepare the returns. Our earnings are much easier to file now, and I would like to prepare our returns with my account. How can I start a new return?