Can you clarify what you mean by "did not reduce taxes paid."? Your employer is required to withhold according to a formula provided by the IRS, so when they paid you in January, it was based on the amount you were paid. When they deducted the bonus in July, once again- the withholding was based on the amount you were paid. Now you file your tax return and the withholding on your W2 will be applied to the tax you owe so you will owe or have a refund. The amount of withholding on your W2 was the amount your prior company paid to the IRS.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"