Singapore law stipulates that companies legally established in Singapore are required to submit ECI and from C (or from C-S) forms (an important part of Singapore companies' annual tax returns) within a specified time. ECI form: fill in the estimated taxable income of the Singapore company in the corresponding tax year; From C (or from C-S) form: it is used to formally process tax returns of Singapore companies.

1、 Accounting data

1) Monthly bank statement and water bill;

2) Sales contract and invoice;

3) Cost contract and invoice;

4) Expense bills (salary, rent, freight, etc.);

5) Others: two originals of the articles of association, one copy of business certificate, annual declaration form, D1 form of the notice of the first secretary and director, copies of all company change materials (if any), fixed assets bills, investment related documents, the first 3-5 purchase and sales invoices and corresponding receipt and payment documents of the next year.

2、 Tax declaration method

1) Zero declaration: the company's bank account has been opened and there are no business activities. Unaudited financial statements must also be submitted for tax declaration.

2) Tax return after bookkeeping: small companies that have business activities need to issue unaudited financial statements while submitting tax returns.

3) Tax return after accounting audit: for Singapore companies that do not meet the audit exemption, their financial statements must be audited and submitted together with the tax return.