I spot checked some sources and also checked some other sources You did not add sources for about 100 countries The map has inaccuracies including at least Saudi Arabia inverse of residence system residents not taxed nonresidents are Pitcairn not a country population only 67 Akrotiri and Dhekelia not a country part of Cyprus Kiribati appears to be shown as territorial but the cite tax law indicates residents are taxed on worldwide income Also the mere fact that there are over 70 sources for one map indicates conclusively that it is OR If it were accurate I would applaud your efforts However WP is not the place to publish OR I have deleted I would note that one of the Big 4 CPA firms has a guide listing only 140 countries It is the most comprehensive of the books by the Big 4 but still very incomplete