Hello.
I would suggest that, at least at the beginning of the first three months of the business, the deadline for self-employed persons to pay their income tax and contributions should be extended to at least the 20th of the month. My first invoice will not be paid until the 18th, and in a few days I will have to pay EUR 370. This is illogical and, above all, it hinders beginners on the self-employed route.