Reference for using 529?

Does anyone have a reference book or website on correcting using the 529, now that son is graduating?

I don’t need to compare 529’s, just to know how to properly take money out and use the account now that we will be doing more with it than just putting money in.

https://www.fidelity.com/learning-center/personal-finance/college-planning/college-529-spending

Be sure to pay attention to matching the year. Requesting 529 funds when the Spring semester bill arrives in late December but putting off actually paying the school until after the busy holidays will cause problems.

Thank you RichinPitt!! Appreciate it.