Which tax form is used for claiming Moving Expenses?

The correct response is indeed Form 3903. This form is specifically designated for taxpayers who wish to claim moving expenses related to a change in job location or starting a new job. It allows individuals to itemize and report the costs incurred during their move, provided they meet the necessary qualifications, such as being an active member of the Armed Forces or meeting certain distance and time tests related to their employment.

The other forms listed serve entirely different purposes. Form 4852 is used as a substitute for a W-2 or 1099-R when the original is lost or not provided. Form 8332 is utilized for releasing a claim to an exemption for a child by a custodial parent, primarily in child custody arrangements. Lastly, Form 8379 is for the injured spouse allocation, allowing one spouse to claim their portion of a tax refund when the other spouse has a tax liability that could reduce the refund.