You might have already closed your books, which is why QuickBooks is preventing you from recording a backdated contractor payment, Aarondenise. We can adjust your closing date so you can issue the check and include it in their 1099s. 

To do this, here's how:

1. Sign in to QuickBooks Online (QBO) as a primary admin or company admin. Only admins can make these changes.
2. Go to Settings ⚙, then select Account and settings.
3. Select the Advanced tab.
4. Click Edit ✎ in the Accounting section.
5. Change the Closing date. Note: To change your password, just enter a new password and confirm it.
6. Select Save, then Done.

After that, create a backdated check to pay your contractor. Then, close your books to prevent changes to your past transactions.

Whenever you're ready to prepare your 1099s with QBO, you may want to check out this article as your guide: Create and file 1099s with QuickBooks Online.

For any other 1099 concerns or questions about managing contractor or vendor payments in QBO, you can tag me in the comments below. I'm always ready to help you out.