QB Issue Resolution:

You can import the items as an IIF file, but not the price levels.  I don’t think there is any way to import them.

If you can get your items as a list in an Excel worksheet (or a CSV or similar text file you can open in Excel) then you can use our BRC List Importer to create an IIF file containing the items into your QB company file.

Resolution for Issue 'how do i import product and price level in quickbook 2019?' available: Yes (Solved).
Source: Intuit Community forum.

how do i import product and price level in quickbook 2019?: 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.

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