2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/46512We work out and review prospects for future quarkonium physics at HERA. We focus on the impact of color-octet contributions and discuss how measurements at HERA can be used to test the picture of quarkonium production as developed in the context of the NRQCD factorization approach.LaTeX2e, 19 pages, 6 figures. Contribution to the proceedings of the workshop `Future Physics at HERA'High Energy Physics - Phenomenologytext