For hours, you can track it through the invoices/receipts to your clients. As on the site:
If the applicant is self-employed, articles of incorporation or other evidence of business ownership, evidence of self-employment income and documentation from third-party individuals indicating the service provided along with payment details (self-declared main duties or affidavits are not acceptable proof of self-employed work experience).
- Articles of incorporation (registration, license, website, workplace photos)
- Self employment income (contracts with your customers, receipts and invoices, taxes, bank statements)
- Reference letters from customers with payment information with contact information.