To clarify, did you do a withdrawal or loan from 401(k) since both are treated separately?
If you take a 401(k) withdrawal and are under the age of 59.5, then this withdrawal is considered income and will be taxed now. This is also true even if the proceeds were used to purchase your home.
If you take a 401(k) loan, this is not considered income and you will not be taxed on this.
You can visit Exceptions to the penalty for an early withdrawal from my 401(k) for more information.
