QB Issue Resolution:

You separately control what you see on screen and what you see in Print Preview/Print/Email output, in List menuĀ  > Templates List, Edit that template. You go to Additional Customization and select what you want to see on Screen and what you want to have in the output.

Please see this article:

Use and customize form templates – QuickBooks Learn & Support

And please see my attachments.

Resolution for Issue 'when making an invoice,i hit print preview and what im putting under the description is blank' available: Yes (Solved).
Source: Intuit Community forum.

when making an invoice,i hit print preview and what im putting under the description is blank: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

Support for Additional Customization
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Error Recovery for Additional Customization [Canada]
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