Read the information below to find out when your tax return is due. If the due date falls on a weekend or legal holiday, the due date is extended to the next business day. ELECTRONIC FUNDS TRANSFER (EFT) DEBIT, AND ELECTRONIC FILING (E-FILE) USERS As an EFT debit user or e-filer, you can initiate your payment any … Continue reading 2020 EXCISE TAX RETURN DUE DATES W/ DOR-WA