Canada Revenue Agency
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Box 10 - Province of employment

Enter one of the following abbreviations to indicate where the employee reported to work:

AB Alberta
BC British Columbia
MB Manitoba
NB New Brunswick
NL Newfoundland and Labrador
NS Nova Scotia
NT Northwest Territories
NU Nunavut
ON Ontario
PE Prince Edward Island
QC Quebec
SK Saskatchewan
YT Yukon
US United States
 
ZZ Other
Enter ZZ if an employee worked in a country other than Canada or the United States, or if the employee worked in Canada beyond the limits of a province or territory (for example, on an offshore oil rig).
 

The province or territory of employment you enter depends on where your employee has to report for work. For more details go to Which provincial or territorial tax tables should you use?

For any employee who worked in or whose employment was located in more than one province or territory in the year, complete separate T4 slips. For each location, indicate the total remuneration paid to the employee and the related deductions, such as CPP/QPP contributions, EI premiums, PPIP premiums, and tax.