To get the extension you must fill in Form 504E correctly and file it by the due date of your return and pay all of the amount shown on line 6.
Due date: file Form 504E by April 15, 2026. If you are filing on a fiscal year basis, file by the regular due date of your return.
Payment: Form 504E does not extend the time to pay taxes. If you do not pay the amount due by the regular due date, you will owe interest and be subject to a penalty.
Six months: no extension request will be granted for more than six months, except in the case of a fiduciary who is out of the United States.
One year: in no case will an extension be granted for more than one year from the due date for submitting the fiduciary tax return.
| Question | Answer |
|---|---|
| Form Name | Form 504E |
| Form Length | 2 pages |
| Fillable? | Yes |
| Fillable fields | 22 |
| Avg. time to fill out | 4 min |
| Edition | 06/25 |
| Filing deadline | April 15, 2026; on a fiscal year basis, the regular due date of the return |
| Where to send | Comptroller of Maryland, Revenue Administration Division, 110 Carroll Street, Annapolis, Maryland 21411-0001 |
| Matches the agency's file | Yes, checked October 2, 2026 |
| Other names | 504E, Form 504E, Maryland 504E, MD 504E, Application for Extension to File Fiduciary Income Tax Return |
| Official source | Form 504E (Rev 06/25), Comptroller of Maryland |
Maryland Form 504E isn’t the one you’re looking for?