Employers should submit a Combined Registration Application no later than 20 days after the first day of business. Maryland Combined Registration Online Application.Account activation and registration instructions for employers and third-party agents are included below. How do employers create an account in BEACON? Register for Maryland Unemployment Insurance and Withholding Tax accounts online. Get your employer number and tax rate after registration. Employers who have employees working in two or more states may use this form to register to submit their new hire reports to one. Register for taxes as an employer. This process is known as the Employer Registration process. To fill out this form, gather all necessary information regarding your business.