Initially I did not send. But later on, after six months, they asked me to correct background, without time gaps, and resend. I sent all the financial statements then and they accepted those. But I think you can send now.
Can you tell me when you submitted your business plan? Is it the time when you first submit your materials or when you are requesting supplementary materials?
Invoices, client reference letters, contracts, company registration, tax documents, images of your work (if applicable) etc... According to CIC the onus is on you to prove your experience.