Hi ankur1306!
Welcome to QuickBooks Community. Let me assist you and share some details about foreign currency.
QuickBooks Online uses IHS Markit to determine the exchange rates. Currently, we're unable to download the previous rates in QuickBooks Online. However, you'll want to directly check the IHS Markit website for the historical exchange rates.
I added these articles for more details on how to manage the foreign currency in QuickBooks Online:
You're always welcome to ask other questions you might have about your transactions. Do you need help in running reports? Let me know and I'll ensure to make your QuickBooks Online experience more pleasant.
