This is a common point of confusion for a household relocating from a place with a veteran exemption program built into the local tax code, since Saskatchewan's system was never designed around service status the way some other jurisdictions structure their municipal relief.
The appeal process that does exist here, filing with the Board of Revision within the deadline on your assessment notice, is open to every Saskatoon homeowner on the same terms, arguing that the assessed value itself is wrong rather than arguing for a status-based reduction.
A veteran selling in Saskatoon should plan around the standard tax picture rather than a break that is not part of the local system. Get your hand-reviewed valuation from Joel Dyck.