Do my financial statements need to be signed by an accountant?

No. Your business is not required to use a chartered accountant for its financial statements. Anyone can prepare their own financial statements and there is no requirement for a business to use a certified accountant to do so.

Your financial statements do not need to be signed by a professional chartered accountant, you can use your own in-house financial statements. Note that financial statements include an income statement (revenues minus expenses) and a balance sheet (assets, liabilities, owners' equity).