CRA wants to group foreign non business income with foreign tax paid in
group of countries and not specific country names. For the
purpose of Netfile only the
country id is required. You can group all the foreign non business income into one
to three grouping. Specifying the country name associated to the country id
that you select on the T slips is optional and can be specified
on T2209 form(use the Forms button to add T2209).
If the foreign income comes from mutual fund or a source that cannot be determined, then simply select Country 2/unknown and do not add a country name to T2209.
The following picture show where you can find the list of country ids for T5. Note that T3 and T4PS have also a similar country list box: