Federal support for veterans in Canada runs through Veterans Affairs Canada, disability benefits and other programs entirely separate from the municipal tax roll the City of Saskatoon administers, so those benefits show up on a different form and through a different office than a property tax notice.
What is available to any Saskatoon homeowner, veteran or not, is the standard assessment appeal to the Board of Revision, filed within 30 days of the notice date, if the assessed value itself looks wrong relative to comparable properties. That process has nothing to do with service history either way.
If a veteran homeowner is weighing whether the tax bill is a reason to sell rather than a reason to appeal, that is a separate and worthwhile conversation. Get your hand-reviewed valuation from Joel Dyck.