Two tax systems. One workspace.
Most platforms assume your client files in one country. We assume they don’t — MJDS spread carry, treaty withholding, superficial-loss vs wash-sale, flow-through credits, NR-301 and Form 1116, computed for the right passport.
What a cross-border tax pro gets.
US-only tools quietly break every Canadian tax mechanic. We file in both.
Treaty-Aware Withholding
Canada-US treaty rates, NR-301 and Form 1116 foreign-tax-credit mechanics — the right number for the right passport, every time.
treaty · NR-301 · 1116Superficial-Loss vs Wash-Sale
The 30-day rules differ across the border — track both so a client’s loss isn’t quietly denied on the wrong side.
both 30-day rulesFlow-Through & MJDS
Flow-through share credits, MJDS spread carry, and dual-listed FX-adjusted cost base — the CA-specific mechanics US tools break.
FTS · MJDS · FXDual-Filing Evidence
SEDAR+, EDGAR and SEDI unified — every filing and insider trade for the entity, cited to source for the working paper.
SEDAR+ · EDGAR · SEDIBuilt for clients who don’t file in one country.
Stop rebuilding cross-border mechanics in a spreadsheet. Start free — 30 Quinn queries a month, no card.