I am employed and have registered a business as well but there has been no activity on the business front , do I only file my employment return or both. Thx

If your business is a Sole Proprietorship (not incorporated), you file it along with your personal income taxes on the T1 General tax form. If you wish to keep your business going or active and plan on earning income from it in the future, you should fill out the T2125 Statement of Business Activities, but not claim any income or expenses on it. 

My business was incorporated in 2017, I havent filed anything in regards to the business in 2017 return .....whats your advice...Thx for your time appreciate it