Does non taxable contributions to 401K plan provided by employer need to be reported?

[amberquezada]

My 401K retirement plan is through my employer, the money that is contributed to it, by me, is done before taxes. Do I still have to report this on my return? If so, how do I report it without it showing it is taxable money?

[DexterS]

The money you have deferred from your wages is deducted before calculating Box 1 wages on your W2 so you are not taxed on it until you withdraw it. 

Your employer's contribution is also not taxable until you take a distribution.

You don't report either amount on your tax return.