We do not have a download file for the latest version (21.0.4014.904), but you can try downloading it from the developer's site
Download version 18.0 from Software Informer
Scanned by 7 antivirus programs on Jan 17, 2019.
The file is clean, see the report.
Version: 18.0 (x86)
File name: quickbookspremier2011.exe
Size: 541 MB