The Delaware Division of Revenue has released a publication listing the 2019 withholding tax due dates for Eighth-Monthly (Form W1A), Monthly (Form W1), and Quarterly (Form W1Q) withholding filers. Returns should be received by the due date of each return. For those filing electronically, transactions must be initiated at least one day prior to the due date. The tax type code is 01106.
Aside for some adjustments for weekends and holidays, the due dates remain the same as those for 2018.