1. GST Registration Details: Include when the business is GST registered or when specifically requested by the recipient

2. Professional Licenses: Include when the self-employed person holds professional licenses relevant to their income generation

3. Bank Account Information: Add when required by the receiving institution for verification purposes

4. Declaration of Accuracy: Additional legal declaration confirming the truthfulness of the information, used when required by specific institutions

5. Business Growth Projection: Include when the letter is being used for loan applications or investment purposes

1. Income Tax Returns: Copies of recent income tax returns (usually last 2-3 years)

2. Bank Statements: Recent bank statements showing business transactions and income (usually last 6-12 months)

3. GST Returns: If applicable, copies of recent GST returns

4. Business Registration Documents: Copies of business registration certificates, licenses, or permits

5. Financial Statements: Profit and loss statements or other financial records if maintained