Question: how to import vendor transactions into quickbooks?
Answer: Step 1 - File Selection: Select "QuickBooks Transaction Type" as "Vendor". ... 
Step 2 - Mapping: Set up the mapping of the file columns corresponding to QuickBooks fields.
Step 3 - Review & Import: Review your file data in the Review Grid screen and click "Send to QuickBooks" to upload your file data to QuickBooks.