It depends. If it was just cash (say transfer of a bank account), you won't owe any federal tax.
If it is money that came from an IRA or the sale of assets such as stocks, bonds, or property then you will likley have some tax on the income or the gain on the sale of the assets.
**Say "Thanks" by clicking the thumb icon in a post**Mark the post that answers your question by clicking on "Mark as Best Answer"