Not keeping personal information up to date – It’s important to tell the CRA as soon as possible about any change in your address or your direct deposit details. You’re also required by law to tell the CRA about any changes to your marital status. 

A registered education savings plan (RESP) is a contract between an individual and an institution such as bank, for the purpose of providing future funding for education purposes.

If you are buying and selling stocks using a TFSA you should not participate in day trading or overly frequent trading. Day trading is the act of buying and selling financial securities within a short time frame, with the goal of generating profit from trading activities.