The currency decimal point is set as default in the program, accounts-zadco-o.
QuickBooks Online downloads exchange rates nightly from WSoD (Wall Street on Demand). You can also manually enter exchange rates and revalue them if needed.
Let me show you how:
Go to Settings ⚙️, then pick Currencies.
Click Edit currency exchange under the Action column.
Choose Yourrate to enter your currency.
Select the small arrow ▼ icon in the Action column, then choose Revalue currency.
Click Revalue and save.
You don't need to worry if you see a report that is off by pennies. The government understands rounding discrepancies and ignores penny differences.
Learn more about this by reading through these articles: