@pierogiburo @jcm @kookie @alina the minimum "assumed income" are 1.3k, that's then used to calculate the actual health insurance contribution which currently equates out to ~220 euro depending on insurance.
the maximum are 5.8k even if one has more, so they most likely just used that
edit: the maximum equates out to roughly 1k but the late fees they charge tend to be a bitch. I'm still not sure how they got to 40k and would say best to just contact them