Visit Intuit QuickBooks App Product site page. Then, click on Yes when asked "Will you be including QuickBooks Desktop in multi-client mode — various PCs". From there on out, pick the Country, Edition, and QuickBooks product. As of now, you will show up on the QuickBooks Premier 2021 download page, click on Download. Open and Run the Quickbookspremier2021.exe file. Follow the on-screen steps. Recognize the License Agreement. Enter the Product and License key and hit Yes. After the installation, access QuickBooks Premier 2021.