File your T4 information return with the Canada Revenue Agency via the Internet to receive electronic confirmation of receipt within seconds. Reduce your paper consumption, mailing costs and, of course, it is environmentally friendly. Visit cra.gc.ca/t4internet
to discover the filing options available to you.
My Business Account provides secure, online access to tax-related information your business has on file with the Canada Revenue Agency (CRA). View your account balances, transactions, and much more for GST/HST*, payroll, corporation income tax, and other accounts with the CRA. Visit cra.gc.ca/mybusinessaccount
.
* except GST accounts administered by Revenu Québec
This list notifies employers about new or updated information for Payroll Deductions, Payroll Deductions Tables, Tables on Diskette, Taxable Benefits, Payroll Deductions Formulas for Computer Programs, events and business seminars, and other matters of interest to employers. Additionally, through this list, you will also receive information from Service Canada concerning the "Record of Employment (ROE)". Articles in the series "Canada Pension Plan and Employment Insurance explained" are also available.
Visit cra.gc.ca/payroll 
The CRA offers a variety of events and seminars to provide you with important tax-related information, such as GST/HST, payroll, or setting up a new small business. Visit cra.gc.ca/events
to learn how to register.