Can I create a vendor with non-core currency for my account and put the opening balance for it from suppliers?

Yes, you can create a vendor with non-core currency, msaleh-cloudinn.

You can assign a single currency to most types of customers and vendors. Just make sure to turn multicurrency on.

Please know that once you turn multicurrency on, your home currency is set and cannot be changed. Here's how to use this feature.

1. Go to Settings ⚙️, then Company Settings.
2. Select the Advanced menu.
3. Click Edit ✎ in the Currency section.
4. Switch it on.
   
5. Mark the Multicurrency checkbox and confirm that you understand that you can't undo this option.
6. Click Save, then Done.

Once done, you can add the new vendor and assign the currency. Here's how:

1. Go to Expenses, then Suppliers.
2. Select New Supplier.
3. Complete the fields in the Supplier Information window.
4. Make sure to select a currency from the I pay this supplier with drop-down.
   
5. Click Save and close.

For the opening balance of the supplier, you can enter a bill or expense. The first transaction will become the opening balance on the supplier's account.

Also, please know you need have to add a new account for each different currency that you use in transactions. I'm adding these links for additional information to know what happens when you turn on Multicurrency.

• Learn about Multicurrency in QuickBooks Online
• Turn on and use multicurrency

Stay in touch with me if you have additional concerns about adding a new vendor with non-core currency. I'm always around here in the Community Forum to help you.