Those emails are just marketing emails; if you know you filed your return and the IRS has processed the return, just ignore the emails. As for starting a 2023 return online---that is impossible. Online software for 2023 is closed permanently. The 2024 desktop download is available now; the online 2024 software will become available in early December.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**