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Go to Admin> Manage Users> Users.

Select the user who needs to be reimbursed.

Click Edit next to the user’s details.

In the profile editor, switch to the Expense tab.

In the Default Vendor field, select the vendor record that corresponds to this user.

Typically, the vendor name should match the employee or user being reimbursed.

Click Save to update the profile.

Once the default vendor is set, resubmit or sync the expense so that it can be properly linked with QuickBooks Desktop.