Not alone if later transactions need explanation.
Trace the funds through the intervening steps
Use genuine records for actual transfers and sources. Do not treat one historic contract as proof of a balance or transaction it does not describe.
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. The common weakness is a period where funds sat in a personal account mixed with other money, so a short written explanation supported by statements should accompany any point where the trail is not self-evident. The firm's own records follow: formation documents, three years of tax returns, payroll, equipment titles and lien searches, current contracts, licences and insurance. Every number in the projection should trace to a document already in the file: the lease for the rent line, equipment quotes for the capital line, signed supply terms for cost of goods, and the wage assumptions behind payroll.