QB Issue Resolution:

Do a 100% physical inventory counting the actual on hand qty for each item

use inventory adjust, set the adjusting account to COGS-shrinkage, and enter the actual on hand qty per item, save

Resolution for Issue 'how to ajust end of year inventory' available: Yes (Solved).
Source: Intuit Community forum.

how to ajust end of year inventory: 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 COGSshrinkage
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Error Recovery for COGSshrinkage [Canada]
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