We contributed money to both of our children's 529 accounts for Maine. Where do I report these contribution amounts on my taxes?

[AndreaC1]

Contributions to a qualified college savings plan are not deductible on your federal return, but may be deductible on your state return.  If your state allows a deduction, you will see the entry point as you work through the state return. 

You can find more details here Information on 529 Plans