How to merge contractors transections

Thank you for posting your concern here in the QuickBooks Community.

Can you tell me more about the transactions you're trying to merge? Is it coming from different contractor profiles? It'll help me provide you with an accurate solution.

Currently, the option to merge two or more transactions is unavailable. If it's coming from a different contractor profile, you may consider adding it from one contractor to another. Once done, consider deleting the first profile. 

You can also check this reference for more information: Merge duplicate accounts, customers, and vendors in QuickBooks Online.

Moreover, you may want to visit this article to learn how to prepare and file your federal 1099-MISC and 1099-NEC if you have QuickBooks Contractor Payments: Create and file 1099s with QuickBooks Contractor Payments.

If you need more help managing your contractors, please don't hesitate to reply on this thread. We'll be here to assist you further. Take care and have a great day ahead.