[Issue filing electronically due to business address in another province]

I'm a self employed commission income earner and work from home in QC. The corporation I work for is in another province, MB. Netfile is saying I can't file my Federal return electronically because of the following?

Postal code in the business address does not agree with province of residence.

Is there a way to correct this?

[Commissions]

Hello, 

I followed the steps above to add T2125C for a self employed commission income. Do I complete the home office expenses under employment expenses section AND home office expenses under T2125C? If not which home office expense section should be used?