@Moclips and anyone else still having problems printing from an older data file. Just a thought, but I used to do this in the "old days" for one of my clients. Make a new company file and import or input the 1099 Vendors you need to print forms for. This can be done manually or by importing via an IIF file. Then enter one check with the total amount for each vendor, dated in 2021, enter the Company information and hopefully that will allow you to print in the new format. Of course, test it before you enter all the data.

My other work around is to install QB on another computer, copy your company file over and print the forms from there. 

I don't think QB Support is geared to help us with all of this as is evident in their cut and paste responses on this thread. Good luck to everyone!