Question

Why would the north want to count the slave population for tax purposes, but not voting purpose

Answer 1

Northerners at the Constitutional Convention wanted slaves not to count as persons at all, because the Northerners didn't want the slave states to get all those seats in the House. Not all Northerners opposed slavery, but they opposed giving the South political power based on nonvoting slaves

Answer 2

Answer: Because at the time the government distributed the taxes between people in the cities, so the more people the fewer taxes they had to pay. But they didn't want the slaves to vote because...

They were worried if they got ideas they would revolt

They didn't want the slaves to vote for freedom because they wouldn't have people to work for free.

Step-by-step explanation:

And it was the South that wanted this. Most people who lived in the North viewed slaves as actual people. That is why when slaves escaped, they ran for the North.