Use ownership records, payroll evidence, charts, decision matrices, budgets, and dated delegation records.
Reconcile both operations
Build the file element by element and let each document do one job. The qualifying relationship is shown by share registers and incorporation documents, plus a chart tracing control to a common parent where ownership runs through holding companies. Active business on both sides is shown by tax filings, invoices, bank activity and payroll registers rather than by a website.
The one continuous year of full-time qualifying employment abroad, which must fall within the three years before the petition is filed, is shown by dated payroll records, T4s and an employment letter stating the start date, the full-time character of the work and the duties performed. The U.S. role is shown by an organizational chart with named positions, position descriptions for the people who will be directed, the budget the transferee signs, and a delegation memo naming who assumes each Canadian task and on what date; together those papers have to show a position that is primarily managerial or executive rather than a title asserting it.
Label planned hires as planned and give an expected date, because describing them as current staff is the commonest way a file contradicts itself. For a new office add the executed lease or premises evidence and the business plan. Where an unaffiliated client site is involved, include the services agreement showing the petitioner directs the work.
Keep originals with a dated index and state gaps openly instead of filling them with assumptions. A U.S.-licensed immigration lawyer can tell you which gap actually matters.