QB Issue Resolution:

IF, if you use condense data, before you do, print to pdf all critical financial reports

after the condense open the condensed file, print the same reports, they must match.  If not the condense did not work properly – in my experience that is about 60% of the time.

In the accountant version there is a period copy option which purports to do the same thing you are asking, with the same degree of reliability in my experience

the first two utilities on this page will do it reliably

http://www.q2q.us/indexutilities.htm

Resolution for Issue 'How can I archive some years from my company data, so I only have the last 2 years in there and rest is archived and I can access them as needed?' available: Yes (Solved).
Source: Intuit Community forum.

How can I archive some years from my company data, so I only have the last 2 years in there and rest is archived and I can access them as needed?: 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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