After you retire, you must wait at least 45 days before accepting employment with any participating employer. AARP's state tax guide on 2023 Maryland tax rates for income, retirement and more for retirees and residents over 50.Documents and Tools for Allegany County Employees, including benefits and departmental forms. A rehired employee may: (1) freeze the pension benefit. We recognize the importance of benefits within the overall compensation package provided to all of our eligible employees. First complete your 2022 federal income tax return. You will need information from your federal return to complete your Maryland return. Maryland in the taxable period. Mail to your spouse copies of your response and any attachments you file with the court. Maryland State Tax Withholding. Request.