If you are doing Netfiling, keep in mind that CRA does not take address information from the filing. The return does include address information, however, unless you have never filed return before, CRA will use the address on its record and will ignore the address from the filed return.
If you are paper filing are is doing EFILing, you need to type the mailing address correctly.
CRA will not update your client's address If you using ReFile. ReFile restrictions could change from time to time. So you need to check CRA Site every year.