I have The Simple plan with quickbooks online. I do not have the option of vendor credit. What other way can I enter a credit from a vendor

I can provide you a workaround on how you can apply for a credit from your vendor, @nancyb8.

Since vendor credit isn't available for QuickBooks Online (QBO) Simple Start subscription, we can create a Bank deposit instead to offset the amount you need to your vendor. Here's how you can create a bank deposit:

1. Click the +New icon and select Bank deposit.
2. Choose the vendor in the RECEIVED FROM drop-down, then fill out the rest of the required information.
3. Click Save and new.

That's it! Please let me know if there's anything else I can do to be of assistance. Wishing you and your business continued success in all that you do.

When I follow your instructions, the bank deposit doesn't have an option to select a vendor or fill anything out. 

I've never used the bank deposit.  With income I generate a sales receipt and that in turn is matched to what is pulled over from my bank.  Matches perfectly!

When the refund hits our bank and is brought into QB, can't I just make it as a transfer?

Hello there, @nancyb8.

You can add the vendor's name in the Received from on a Bank Deposit page. Let me show you how.

Here’s how:

1. Select the Plus icon (+), then Bank Deposit.

2. In the Add other funds to this deposit section, fill in the following fields: 

 Received from: Select the vendor name.

 Account: Select the Accounts Payable account.

 Amount: Enter the check amount.

3. Select Save and close.

For the steps and details, check out this article: Record and make Bank Deposits in QuickBooks Online.

Keep me posted if you have any QuickBooks related concern. Wishing you and your business continued success. Keep safe and healthy.