It's okay, Snowy. I'd be glad to help.

If you can't find the Accounts Payable account in the dropdown when writing checks, it might be because there's no bill created yet. To resolve this, you can create a dummy bill so that the system will generate the account. Then, you can delete the bill. To do so, here's how:

1. Go to the Vendors menu, then select Enter Bills.
2. Choose a Vendor from the dropdown, then fill out the Date, Amount, and Due date fields.
3. Pick the type of bill you want to record. "Expenses" is for phone service, rent, and utilities. While "Items" is for products, shipping and handling charges, and discounts.
4. Select an account from the Account dropdown.
5. Click Save to record the bill.
6. Open the bill again and hit Delete.

Once you're done, you can write a check for your vendor and choose the Accounts Payable account by following the steps provided by my colleague @JenoP above. 

In case you need guidance in recording refunds you received from a vendor, you can check out this article: Record a vendor refund in QuickBooks Desktop.

Please let me know if you need further assistance finding the Accounts Payable account when writing checks. Feel free to reply on this thread.