How to add a vendor for 1099 who is under the threshold in quickbooks due to multiple payment systems?

We'll have to manually enter all payments from the other system (Management Software) to file the forms via QuickBooks, April. I'll guide you on how to do this below.

Only those vendors you paid above the annual $600 cash threshold get a 1099. Since not all payments are recorded, they'll be categorized as contractors below the threshold while filing your 1099s. To enter their data from the other platform, you can create an expense or check transaction.

If you choose to track them as expenses, here's how: 

1. Go to + New, then select Expense.
2. Input all the necessary details of vendor payment.
3. Select Save and close when you're done.

If you want to enter checks, please see this article for the complete guide: Record checks in QuickBooks Online.

Whenever you're ready, create and file your 1099s with QuickBooks Online.

Also, I'm including this article to help answer the most commonly asked questions about 1099s in QuickBooks: 1099 concerns.

Please feel free to get in touch whenever you have further concerns about 1099s and tracking vendor transactions in QuickBooks. We in the Community are always ready to help you out.