
On the main city of the settlement, there will be a button (or a few) when you hover over. The abandon button looks like ruins and fire, I believe. Click it, takes a turn to abandon.
How do you make a settlement desolated?
If you put the mouse over the main city/town building chain for a settlement, it will bring up the tab over it that gives you the options to upgrade, convert, or demolish. There is an extra option for the main settlement chain that abandons the settlement. Click that and it'll be desolated on the next turn and give you some money.
Is there a way to abandon settlements?
There is an extra option for the main settlement chain that abandons the settlement. Click that and it'll be desolated on the next turn and give you some money. @Jiruri The public order penalty isn't that bad unless you're abandoning several settlements at once. For one settlement, it's only like 3-5 and only for one turn.
How do I upgrade a settlement?
If you put the mouse over the main city/town building chain for a settlement, it will bring up the tab over it that gives you the options to upgrade, convert, or demolish. There is an extra option for the main settlement chain that abandons the settlement.
How bad is the public order penalty for abandoned settlements?
@Jiruri The public order penalty isn't that bad unless you're abandoning several settlements at once. For one settlement, it's only like 3-5 and only for one turn. yeah the penalty wasn't too bad with just one town. Thanks again SODK and thanks Pinkerton.

How to solve corruption?
First, by excluding a province from paying taxes, which is completely pointless in long term. Excluding a province doesn't lower the corruption, just limits it to zero, which with the lack of profits doesn't matter anyway .
When to exclude province from tax system?
First - when you're unable to give it enough food, from import or local production. When shortage is a level 50 and more it is a good moment for that, if shortage is at level 100 and more it means the province is in catastrophic state.
What happens if you exclude a province from taxes?
If a province gives you five thousand coins each turn, and you're profit equals eight thousand, then excluding it from taxes will take away most of your profits and thus will slower growth of other provinces. Additionally, one large war or crisis will be enough to change profits into loses. But if profits from a province are 500 per turn and the whole country earns ten thousand, then the treasury won't feel drastic change after excluding province.
How do immigrants affect the public order?
Immigrants lower your public order as well. The loss of order depends on amount of immigrants in a province. Up to 24% loss equals one point, up to 34 2 points, more than 34 means loss of three point and so on. It isn't much so you don't need to worry too much about it. Especially since you don't have much influence on immigration - even if you're not waging wars, you are susceptible to it. You can limit it to zero only by excluding a province from taxes, but because of small penalties to order and tax bonuses it isn't the best move. It is better to assume that every province has a constant, small penalty to order and find other ways of increasing that variable.
Can a governor eliminate corruption?
In case of large countries corruption can have tremendous size. Even the best governor can't completely eliminate it, only limit it a bit. Some technologies works in similar manner, reducing the corruption in country by few percents. Sadly, not every faction has access to them, and bonuses offered by them are, similarly to governor case, not large.
Can a province be excluded from paying taxes?
Although the taxes level is set for whole country, it is possible to exclude some provinces from paying. Excluding a province from paying taxes reduces the corruption and immigrants to zero, gives none profit and excludes a province from nation feeding system. A province stops producing food for the rest of the country, no longer exports or imports it.
