Patch 19802493 was originally released as the R12 2014 changes patch but it did not contain all the files needed to ensure the latest code for all aspects of 1099 reporting.
Customers new to 1099 reporting would have had to apply multiple R12 patches to update all the necessary files for problem free reporting. As a result a consolidation patch was requested for simplicity to ensure customers only needed to apply one patch.
If you have already applied 19802493 this is still valid as it provides the changes for this year. However, if you are new to 1099s, didn't apply last years patches or are having issues with your reporting then you should ensure to apply the consolidation patch detailed below.