I missed credit for contributing to my grandson's 529 plan in the past on my MA tax returns so I was paying closer attention this year. On first pass, I skipped Education Expenses section under Adjustments because I personally did't have any such expenses. When I couldn't find credit for 529 plan, I reviewed all the sections more carefully. It turned out, on the Education Expenses menu page, there was a selection for College Savings Plan. When I checked that box, I was able to enter my contribution to the 529 Plan.
Another reason I missed in the previous years was that I had assumed that when I imported forms from my brokerage firm, Turbo Tax would automatically populate 529 Plan contributions. But unfortunately, the imported data did not include that contribution.
So bottom line is, pay close attention to every line of Turbo Tax menu pages and review the returns carefully before filing. Turbo Tax could improve the form by making 529 Plan stand out.
Hope this helps
