Do you mean that no vendors show up?
There can be a couple of reasons for this. Only vendors you paid via cash or check should be reported, and only if the payments total $600 or more. (It's up to you whether to report anything below that). If you entered, e.g., a check for payment but used DBT or Paypal as the check number, it will be ignored. Also, you should check the mapping to your accounts. If the account you used when you entered the bill or paid the vendor is not mapped correctly no payments will show. Check out the video below for more detailed info on troubleshooting these issues.
You can also check out the following articles for more help.
https://quickbooks.intuit.com/learn-support/en-us/1099-misc-payroll-forms/vendor-missing-from-1099-summary-report-or-1099-efile-service/00/370477
Check out Prepare and file 1099s wit QuickBooks Desktop.