The purpose of this legislation is to amend the tax code to provide a tax exclusion for earnings made by members of the Armed Forces during certain overseas deployments. This aims to support military personnel by ensuring that their income from these deployments is not subject to federal income tax, thereby providing them with financial relief. Key provisions of the legislation include expanding the existing tax exclusion for combat zone service to also cover earnings from overseas deployments. This means that both enlisted personnel and commissioned officers will benefit from this exclusion.