Every company is required to file & submit the “Annual Return” to HK Company Registry Department within 42 days after the anniversary of the date of incorporation.
Substantially higher registration fee is payable for filing late. The company and its officers are liable to prosecution and ,if convicted, default fines.
The company’s Business Registration Certificate will be expiry after one year from its incorporation, it needs update on time.

Tax Return:

A new company need first Profit tax return (report) to HK tax Department after 18 months from its incorporation.

Book keeping:

It is better that you can book keeping for your business, you can do it by youself or by CPA.