Superfund a 529 plan

Parents can make 5 years of contributions to a 529 plan at one time while still qualifying for the annual gift tax exclusion.
In 2020, the annual gift tax exclusion is $15,000 per individual.
So, $75,000 can be contributed to a 529 account as lumpsum without paying any extra tax.
It has to be reported correctly in Tax filings as “Form 709” to avoid counting it towards Lifetime estate and gift tax exemption.
If you take money from 529 early for non educational purposes, you have to pay income tax and 10% federal tax penalty on the earnings portion of the money taken out.