Two sets. Employment evidence, meaning payroll registers, quarterly wage reports, I-9s and hours records covering periods before and after closing; and transaction evidence, meaning the purchase agreement, closing statement, funds-flow schedule and wire confirmations. Together they show what you bought, what you paid, and who was actually working.
Building the file the same way an examiner reads it
Keep employment and transaction records in one indexed set, with a short schedule that ties each position to a pay period and each payment to a bank record. Note gaps honestly; a missing quarter is easier to explain now than after a request for evidence. If the seller retains records, put an access clause in the agreement before closing rather than after.
Where salaries, sale proceeds and inherited funds have passed through the same joint account, the file should reconstruct the account's history with statements and a schedule identifying each significant inflow and its source. Land purchase records, quota histories, old corporate statements and tax returns from the years that built the equity can take months to retrieve from accountants, lawyers and government offices, and translations add time. Lawful source and path matter; do not invent bank confirmations or impose an arbitrary universal number of monthly statements without considering the case’s real evidence needs.