In most popular quantum chemistry codes, such as Gaussian and ORCA, the transition dipole moments are automatically printed if you perform a regular TDDFT calculation. For Gaussian users, search "Ground to excited state transition electric dipole moments" from output file of TDDFT task.
woojin park and Tian Lu thank you for sharing this important informations. Can you please share me some articles which is related to this study? I will follow those articles for these calculation. How the transition dipole moment is related to the transition dipole orientation i.e isotropic or anisotropic transition dipole moment orientation?
Carbon, 165, 461-467 (2020) is my recent work about electronic excitation and spectrum of cyclo[18]carbon, in which transition dipole moment is discussed.