Here you can determine for how long your tax collector will be collecting taxes. Longer periods of time,return smaller number of coins per minute.
Periods of 12 and 24 hours, require payment with rubies, unless you have purchased a premium package.
During the time your tax collector is out collecting taxes, you can press the tax button to check his status.
You can always end the collection of taxes earlier, but it requires to pay rubies, unless you have purchased a premium package.
When tax collection ends, you will receive a message similar to this: