This bill, titled the Daniel J. Harvey, Jr. and Adam Lambert Improving Servicemember Transition to Reduce Veteran Suicide Act, seeks to enhance mental health support for servicemembers and veterans. It specifically amends the Department of Defense's Transition Assistance Program (TAP) to include comprehensive information on mental health. This expanded information covers the availability of mental health services, treatment for conditions like post-traumatic stress disorder and anxiety, and education on suicide risk factors, including signs, symptoms, and potential stressors associated with military separation. The goal is to better prepare servicemembers for the mental health challenges they may face after leaving service. Furthermore, the legislation modifies the Department of Veterans Affairs' Solid Start Program to improve outreach to recently separated veterans. The Solid Start Program will now include provisions for assisting eligible veterans with enrollment in the VA's patient enrollment system and educating them about mental health and counseling services offered by the Veterans Health Administration. Finally, the bill mandates that the Secretaries of Defense and Veterans Affairs jointly submit a report to Congress within one year, detailing the information and materials developed under these new amendments.