Let us share information about pulling up the account and routing number for 1099 in QuickBooks Online (QBO), wmedina22.
If you are referring to viewing the contractor's or vendor's bank account information, QBO will only display the last 4 digits of their account number for security purposes. While the Routing number will show the complete details in their profile. See the screenshot for your reference:

If you need to change the vendor's bank account number, we can update it from the Vendor Information section. Let me guide you on how.
- Go to the Expenses tab in the left pane and select Vendors.
- Look for the vendor's name, then click it to open.
- Click Edit beside New transaction.
- Under the Vendor Information, update the bank information under Account no.
- Hit Save to save the changes.
If you need to pay your contractors using direct deposit in QBO, this article provides the steps and details: Pay a contractor with direct deposit.
QuickBooks will also let you manage your vendor's banking information for direct deposit by editing it through their profile. You can learn more about it by checking out this article under the QuickBooks Online Payroll section: Manage your direct deposit for contractors.
Additionally, you may want to learn more about the boxes on 1099 forms and how to prepare them. You can check out these resources for more guidance:
If you'd like a second set of eyes when submitting your 1099 forms, check out our QuickBooks Live Expert Assisted team. They're available on demand to offer guidance.
Please don't hesitate to get back on this thread if you have other concerns or follow-up questions about 1099 or any QuickBooks-related concerns. We'll be around to provide further assistance, wmedina22.