Yes, US citizens living in Canada may be subject to Canadian income tax on their worldwide income, including income earned both in Canada and abroad. The tax liability depends on your residency status in Canada and whether there is a tax treaty in place between the two countries.

Yes, as a US citizen, you are generally required to file US federal income tax returns, even if you live abroad. The US has a worldwide taxation system. You can file your US taxes from Canada and may be eligible for certain tax credits and deductions, including the Foreign Tax Credit or the Foreign Earned Income Exclusion to mitigate double taxation.

Yes, Canada and the United States have a tax treaty in place to prevent double taxation and provide guidelines on how different types of income are taxed. This treaty helps determine which country has the primary taxing rights for specific types of income and provides relief from double taxation.

US citizens can work in Canada, but they may need a work permit or visa, depending on the type of work and the duration of their stay. The specific requirements and eligibility criteria for work permits may vary. It's essential to consult with the Canadian immigration authorities or a legal expert for the most accurate information.

Canada has specific rules for determining how much of your US income is subject to Canadian tax. The tax treaty between the two countries will help determine the tax treatment of various types of income, such as employment income, dividends, and interest. It's crucial to review the treaty and consult a tax professional for a specific calculation.

The Canada Revenue Agency (CRA) has measures in place to detect unreported foreign income and assets. They may use information-sharing agreements with other countries' tax authorities and various compliance measures to ensure taxpayers report their worldwide income accurately. It's important to comply with Canadian tax reporting requirements and disclose any foreign income or assets as required by law.