RCW 48.15.130: Penalty for default.

If any surplus line broker fails to file his or her annual statement, or fails to remit the tax provided by RCW 48.15.120, by the last day of the month in which the tax becomes due, the surplus line broker must pay the penalties provided in RCW 48.14.060(1). The tax may be collected by distraint, or the tax and fine may be recovered by an action instituted by the commissioner in any court of competent jurisdiction. Any fine collected by the commissioner must be paid to the state treasurer and credited to the general fund.