The pricing table seems a little silly, since most of the points are similar across all three price levels... It's a table for the table's sake, I guess.
Also, I personally think the pricing is fairly steep for what you're offering. I actually have an eenmansbedrijf and I spend very little time per year doing invoicing and taxes, let alone per month. Maybe you need different price differentiation, i.e. make it cheap for < 20 invoices / year. That would actually let me ease into it.