Individuals must make estimated tax if expecting $1,000+ tax liability. Corporations must make estimated tax if expecting $500+ tax liability. Self-employed individuals generally must make estimated tax payments
National Insurance number consists of two letters, six numbers, and one letter. Required for UK work, study, healthcare, and social security benefits. Essential for tax deduction and pension calculations
Insurance premium is the amount paid to insurance company for policy coverage. Premiums can be paid monthly, semi-annually, or annually. Premiums may be taxable income for certain coverage types