QB Issue Resolution:

Box 7 contains accounts. Vendors and employees won’t show up there – just accounts on your chart of accounts.

Is the vendor a vendor in QuickBooks? Do they show up in the Vendor list? If so, that’s good. Select them there and choose Edit Vendor. Then make sure that they have 1099 vendor checked.

Resolution for Issue 'I have a vendor that I am not able to 1099 him. I started him as a contractor and then started paying him as a vendor' available: Yes (Solved).
Source: Intuit Community forum.

I have a vendor that I am not able to 1099 him. I started him as a contractor and then started paying him as a vendor: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

Support for contractor
Quickbooks Repair Pro will resolve it efficiently and affordably. Guaranteed resolution of your issue, or you pay nothing!

Error Recovery for contractor [Canada]
E-Tech is the #1 Quickbooks data migration and Conversion service provider.

Get 50% off Quickbooks Online

Click Here for 50% off!

Additional Support Options: