Hello,
I know that as a self-employed person with a secondary occupation, you have to add your income from your secondary occupation to your income from your main occupation in order to calculate your personal income tax.
What I don’t know for sure is whether you also have to add your partner’s income (legally living together or married) to this? So (income from your main occupation + your partner’s income + your secondary occupation). If this is the case, you will be in a very high tax bracket anyway, won’t you?