The Office of the Comptroller of Maryland is urging taxpayers to act this week before the first in a series of system deadlines arrives as the Comptroller’s Office completes its transition to Maryland Tax Connect for Individual Taxpayers, a new online tax portal launching September 1, 2026. 

Beginning July 24, certain payment and filing services will begin going offline in phases as legacy systems are retired and data is migrated to Maryland Tax Connect. Taxpayers who have not yet made a payment or filed a return through the Comptroller's current online systems should do so immediately. 

The following deadlines are now immediately approaching: 

July 24 — Last day for in-person paper check payments at branch offices for personal income, pass-through entity, and fiduciary taxes, by 4:30 p.m. The Comptroller’s Office will resume accepting paper checks at branch offices on September 1. 

July 29 — Last day to electronically file a return or make a payment through current online systems, by 11:59 p.m. Online filing and payments for individuals will resume in Maryland Tax Connect on September 1. 

August 20 — Last day to electronically file and pay Business Taxes, by 11:59 p.m. 

August 21–31 — All systems down for final migration. E-check and credit card payments will continue to be accepted and processed during this period, though they will not post to taxpayer accounts until after September 1. 

September 1 — Maryland Tax Connect for Individual Taxpayers is live. All services resume in the new portal. 

No penalties will be assessed for any payment or filing deadline that falls within the outage window. 

Taxpayers who cannot meet a deadline before the applicable cutoff are encouraged to use e-check, which will remain available throughout the entire transition period. This free, fast, and secure payment method debits directly from a taxpayer’s bank account and can be used for existing balances, estimated payments, and extension payments. Payments submitted during the outage window will be accepted and processed, though they will not post to taxpayer accounts until after September 1. More information is available at MarylandComptroller.gov/Payments. 

Full information on the transition, including answers to frequently asked questions and resources for tax professionals and community partners, is available at MarylandComptroller.gov/IndividualTaxHub. Taxpayers with questions may also reach out to our office via our Service Portal.