Canada was formed by the British North America Act in 1867, which united three British colonies into one country. At this time, Canada did not have control over its own taxation system, and taxes were still being collected and sent to Great Britain, or to England specifically. This continued until 1931, when the Statute of Westminster granted Canada greater independence as a self-governing Dominion within the British Empire.

Despite gaining more autonomy, Canada continued to voluntarily send taxes to Britain for a number of years, even after the Statute of Westminster was enacted. This was largely due to the fact that the British government provided Canada with financial support, particularly during times of war. As such, Canada felt a sense of obligation to contribute financially to the British war effort.

However, in the years following World War II, Canada began to assert its independence more forcefully and started to question the necessity of sending taxes to Britain. This ultimately led to the passing of the Canada Act in 1982, which officially ended any remaining obligations for Canada to send taxes to Britain.

Today, Canada has full control over its own taxation system and no longer sends taxes to Britain. This marks a significant milestone in Canada's history and its journey towards full independence and sovereignty.

In conclusion, Canada stopped paying taxes to Britain in 1982 with the passing of the Canada Act, which granted Canada full control over its own taxation system and ended any remaining financial obligations to Britain. This event marked a significant step towards Canada's full independence and sovereignty as a nation.