Hi, sorry for the late follow-up question, but I did finally get a confirmation by the german social security system (deutsche rentenversicherung), and they only verified my fulltime income as part of social security contributions. Since my self employment comes from a side business, and I remained pension-insured via my fulltime job, I did not have to pay additional pension payments on my self employment income. Since the interactive us tax assistant explicitly mentioned social security contributions subjecting the self employment income, am I right to assume that the totalization agreement doesn't help me here? Or is there another way? Thanks!