по диджитал номад визе все в целом понятно кроме подтверждения net income. Там есть сноска
* In cases where there is no proof of net income, an Affirmation is required according to which the sponsor will certify that his/her net income, after the deduction of contributions and taxes on the income presented in the submitted documents, is not less than the minimum amount required on the basis of the defined income criteria.

Можете пояснить чуть подробнее что это значит?