Links:
[1] mailto:soccoac@coac.net
[2] https://www.boe.es/eli/es/rd/2021/09/28/817/dof/spa/pdf
[3] https://sede.seg-social.gob.es/wps/portal/sede/sede/Ciudadanos/CiudadanoDetalle/!ut/p/z1/xZXRcqIwFIZfpXvhZcxJQkjYO9rpWq3WsdZWuXFCCMquogWqbZ9-g-3s7mwXcMbOLBcwJOE_h-_POcEBnuIgVbtkoYpkk6qVfZ8F7pwR1yEekH4HupfgTwbXE4-NWKdL8MNhAVRcPuCg_vt7HOBAp8W2WOJZbiIz15u0MGkSbfIWlAMt0MlTpCKVliNJGm-ytcnPXs60yYokTrQ6LKVApOuUaludRHgWkVAqzgSKCePIEVqjUAiDPO6J2KUqdkj4nn1FeuA1Zv9QxmtQOCyoA1QbhLoNC3yOezhYrDbhm11-GjK5wEFmYpOZrP2U2eFlUWy_tqAF-_2-nZsFyjc6Uau2seC6FneWmmJOSrqReW4vi_W_lJabvMDTDwp4ZiGKP_K7npzb_L4NPWciKICltEvMHk9Sa5zNcfzbIwtAhRQ0ohEw5DhhjDzlhEg4IQEWasE5w1fQFIGdGOFNng8lkB7QPrgDCb43Gk_6N4SBECfK95r8s6xpNrgYWNZbVSxRucfxtGKn4ymQyik8S74_Pga-Lamyip6tXxU1ZdbbzOSqrqKq4_zlB0DH7mTryfgeKIFOjR-eIVHMLSGuyqqk0kHSaIqoNkCjWHLO1Qe7yYiX8kPZvR0RkOJT5Cvtdk6U7zXV8_-w-6gWerThHXLugE-Gdy69uiQwrEF2VBuudaRT10GOku81tfHPBvl-FjVQc6t_S8cmdLUnkKAKkGPszfMYRTGV0guZkJGgTdToifL11Ebsk7sNBdcVBI_tgbJdT9aSvaAft1evffOAZr3dfn8Xry9C-fLMQ75YzweX7PDI36Zfz29Q8GtitVt8-QnJr3Re/dz/d5/L0lHSkovb0NRd0FBRTRRQUFFSUEhIS80TlZFL2Nh/
[4] https://www.agenciatributaria.es/AEAT.internet/ca_es/Modelos_formularios/modelo_145.shtml
[5] http://www.arquitectes.cat/ca/system/files/users/31339/formulari_prestacions_soc_coac_editable.pdf
[6] http://213.151.109.9/ca/printpdf/print/2039