The going with are the means for QuickBooks 2018 download:
Visit Intuit QuickBooks App Product site page.
Then, click on Yes when inquired "Will you be remembering QuickBooks Desktop for multi-client mode — different PCs".
From that point forward, pick the Country, Edition, and QuickBooks product.
At this point, you will appear on the QuickBooks 2018 download page and click on Download.
Open and Run the Quickbooks2018.exe file.
Follow the on-screen steps.
Perceive the License Agreement.
Enter the Product and License key and tap Yes.
After the installation, launch QuickBooks 2018.