I appreciate you following this thread, Michelle.

I'm here to offer assistance with your query regarding the 1099 concerns.

Yes, you can uncheck the previously filed 1099 contractors. And for the one that has not yet filed, the system will allow you to do it up until April 30. Any forms filed after the said date have to be done manually. 

While you can still file the form electronically, the IRS will consider it late. I would recommend contacting their support to determine the fees.

For reference about filing the 1099 forms, you can check this article: Create and file 1099s using QuickBooks Online. 

Please don't hesitate to post again if you need further help with the 1099 processes. I'll be sure to get back to you.