IMPORTANT § 6: unless you are on a monthly payroll you ARE NOT an employee
IMPORTANT § 7 /10: Invoicing foreign clients (with a CZ trade license) IS NOT Foreign Self-employment, if you have a trade license / zivno select §7 instead of §10. LLC Profits may fit in §7 or §10 - depending whether you have a CZ trade license or not.
IMPORTANT § 8: regular small interests on personal current accounts are usually deducted at source and DO NOT need to be entered in §8.
IMPORTANT § 9: rental income from abroad IS NOT taxed in Czech Republic
IMPORTANT § 10: vested shares should be declared in the year they were vested. Selling of shares, payouts from investment portfolios and profit on property may be tax-exempt.