If filing by paper, mail balance due returns to SCDOR, TAXABLE FIDUCIARY, PO BOX 125, COLUMBIA, SC 29214-0038. Mail refunds or zero tax returns to SCDOR, NONTAXABLE FIDUCIARY, PO BOX 125, COLUMBIA, SC 29214-0039. The balance of tax due on page 1, line 20 of SC1041 must be paid in full.