Keep a dated travel log with entries and exits, your I-94 records, and evidence that the business kept running: payroll, sales reports, supplier orders, bank activity and management correspondence from the periods you were away. Add the written delegation showing who held authority, what they could approve, and what you decided remotely.
Document delegated authority and continuous operations
Renewal or a later application will look backwards, so keep the founding evidence too: the source and lawful path of the invested funds, not merely an account balance, along with the contracts and receipts showing the money at risk. Records can usually be supplemented later, but reconstructing a year of missing operational proof is slow and expensive. Decide now who maintains the file while you are outside the country.
The share register and constitutional documents, the shareholders' agreement, every licence and permit with its holder, the equipment and vehicle schedule, current contracts and customer list, receivables, financial statements and tax returns, payroll records and the lease or deed for the yard. Connect each hiring phase to signed contracts, documented demand, payroll estimates and the cash-flow forecast; clearly label projections that are not commitments.
Explain gifts, loans, asset sales, dividends, and currency transfers with underlying records.