U.S. citizens and residents pay tax on their worldwide income. However, if you live abroad, the articles of most tax treaties allow the country of residence to tax pensions under its laws. If you live in the US and receive a pension paid by a payor from a foreign country, you can claim the applicable treaty withholding exemption. If the foreign government, and/or the foreign withholding agent, refuses to honor the treaty claim, make the treaty claim on your income tax return, or other prescribed form, filed with the foreign country. If you pay taxes abroad, you may be able to claim a foreign tax credit on your U.S. tax return for any foreign income tax withheld from your foreign pension.
Increase in value of property due to market conditions. When you sell appreciated property, you pay tax on the appreciation since the date of purchase. When you donate appreciated property held long term, you may generally deduct the appreciated value.