How did the british taxes lead to greater cooperatin among the colonies?

With the British taxes, the colonies were forced to pay, making them less able to use their extra money to employ/trade with other nations, but they definitely didn't lead to more cooperation. If anything, they led to more upset and turmoil, especially the Townsend Acts and the Quartering Act. But what the British asked wasn't really unreasonable- it just seemed so to the colonies because they had become used to a policy of salutary neglect.