Call our factoring specialists at 8015777931 or fill out the form below. Do You Have Outstanding Invoices?Sales tax returns are due the last day of the month after the filing period. For example, returns for annual filers are due January 31. Salt Lake City, Utah 84190. Dear Glen: David L. Beck. Make every day work better. Level up your payments, point of sale and payroll with the people's champion in business technology. In the latter option, the customer has more time post-purchase to actually complete the payment obligation in cash. First Citizens provides a full range of banking products and services to meet your individual or business financial needs.