Can I turn multicurrency on in the oinline-global edition? I cannot find it. A global version without multicurrency is useless

Multicurrency is available in the global version of QuickBooks Online, . 

It's currently offered in both Essentials and Plus versions. It's possible that you're using Simple Start, which is why you're not seeing the option to activated Multicurrency.

You'll want to upgrade to either Essentials or Plus to turn it on. Here's how:

1. Go to the Gear icon and select Account and Settings.
2. Proceed to the Billing & Subscription tab.
3. In the QuickBooks Online section, select Upgrade. 
4. Choose the plan you want, and select Upgrade.
5. Confirm your payment information and select Save.

Once done, check out these articles as additional guides on how to use the feature: 

• Turn on and use multicurrency
• Assign a foreign currency or multicurrency to a customer
• About exchange rates

I'll be around if you need anything else. 

@billing65 

As additional option, explore this 3rd app to deal with multi currency transactions.

https://veem.grsm.io/veems