Registering for a sales tax permit in Maine is free of charge. There are no fees associated with obtaining the Sales and Use Tax Registration Certificate. Businesses can apply for the permit through the Maine Revenue Services (MRS) website by completing and submitting the necessary application forms online. Alternatively, businesses may submit their registration by mail if required. Since there are no costs, businesses should focus on accurately providing all required information during the registration process to ensure smooth approval and timely compliance with sales tax collection obligations in Maine.