In case of absence of deduction of the EUV, the FOP loses the right to receive maternity benefits in the amount of 100 percent of the average salary (income).
Payment of the EUS in advance in installments is not a violation. At the same time, it is important that the amount of payments by the 20th of the month following the quarter is not less than the set payment amount for the entire quarter. Thus, you can still pay the EUV every month, but pay immediately for a year - regulation of this issue is not provided for by law.
The length of service is not interrupted if you continue to work part-time.
Part-time work is counted towards seniority in a single amount.
According to Part 2 of Article 210 of the Code of Administrative Offenses of Ukraine, repeated violations during the year (in your case, violations of the rules of military registration), for which a person has already been subject to an administrative fine, as well as the commission of such a violation during a special period -
entail the imposition of a fine from fifty to one hundred tax-free minimum incomes of citizens.
For a more accurate answer and solution to the problem, you need to find out what exactly in your situation means a violation of the rules of military registration.