How scheduled vendor bill payment

You can signup for a separate Melio account for free to integrate with QBO and manage your bill payments.

https://affiliates.meliopayments.com/quickbooks

You can get a cashback to pay your first bill with CC. T&C apply.

https://affiliates.meliopayments.com/cashback

I have another workaround on how you can schedule vendor bill payments, JT. 

With scheduled bill payments, you don't have to remember to mail a payment or log onto an account each month or even worry about late fees. 

With QuickBooks Online (QBO), you can take advantage of QuickBooks Bill Pay wherein you can schedule an online bill payment and send funds for you. QuickBooks Bill Pay is available with no fees for any payments processed through August 2023. However, after the promotional pricing ends, you'll be moved automatically to Bill Pay Basic beginning September 1, 2023.

To schedule bill payments, follow the steps outlined below:

1. Select Get paid & pay, then Bills.
2. Create a new bill or select an existing bill.
3. Select Schedule Payment or Save and Schedule Payment depending on what type of bill you’re reviewing:
   • If you create a new bill, you will have the option to schedule the bill right away by clicking Save and Schedule Payment.
   • For an unpaid bill, schedule directly from Expenses, Vendors, or Bills.
4. Choose which bank account you want to use as your funding source and withdraw funds from. Banks you’ve already connected to your QuickBooks account will appear as options, but you can also choose Add a bank account. The full amount of the bill appears by default, but you can select Edit if you want to schedule a partial payment.
   • If you choose to Add a bank account:
     1. Find and select your bank.
     2. Enter your account's user ID and password, and we'll connect it immediately.
   • If needed, you can enter your bank account info manually:
     1. Select Enter account info manually.
     2. Fill the bank details and select Continue.
     3. Within 3 business days, we’ll send you 2 small deposits. The amount will show up in your usual bank transactions.
     4. Monitor your bank account for the 2 deposits from Intuit. Once the deposits appear in your bank account, go back to schedule a payment for the relevant bill.
     5. You'll see the bank name and account number. Select Verify this account.
     6. Enter the amounts of the deposits, and you're all set.
5. In the Payment account in QuickBooks dropdown ▼, select the corresponding account from your QuickBooks chart of accounts to sync your payment information accurately in your QuickBooks Online account. Or, select + Add new to create a new account in QuickBooks to track your bill payment information.
6. Then Next.
7. Choose which payment method your payee prefers and complete the required fields:
   • Bank transfer (ACH): You’re required to enter the payee’s bank account number and routing number.
   • Print check: You’re required to enter the payee’s address. The memo field is optional.
8. For Withdrawal date, select the date when you want the funds to withdraw from your bank account, up to 90 days in advance.
9. After that Next.
10. Review the payment instructions, then if everything looks correct, select Schedule payment. If you need to fix anything, click Back. If you decide not to schedule this payment, you can choose Cancel.

To give you more information about the process, go through this article: Learn About QuickBooks Bill Pay. 

In addition, QuickBooks downloads transactions automatically each time you make an online payment. To learn how you can categorize them, check out this article for your reference: Categorize Online Bank Transactions In QuickBooks Online.

Drop your comment if you need further assistance with scheduled vendor payments. I'll be here to help you all the time.