How do I sign up for the 529 Plan Selection Tool? May 26, 2020 23:17 This tool is currently available for a select group of our of SoFi AtWork partners. Related articles What is the 529 Plan Selection Tool? What 529 Plans are considered in the tool? Something is not working! How can I get help? Why is the 'withdraw' button not appearing on the website for my Invest account? What are the benefits of the 529 Plan Selection Tool?