Several factors may cause this, such as variances between processor programs and changes in tax rates.</p> <p> <strong>h. Non-payment and late fees</strong> <br>In the event of non-payment, SmileBack will have the right, with or without notice, to suspend or immediately terminate your access to the Service. We may determine whether or not to reinstate your access to the Service upon receipt of payment in full of all sums owed.