Perhaps you are confused that the Recently Opened list can only show 20?

It is just trying to be helpful. If you use “jump lists” for Word and Excel, you know that they also cannot show Everything; only Recent.

The No Company Open screen has the button to Open any data file […]

Resolution for '20 companies issue: 'need more than 20 companies' available: Yes.

The 20 companies 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 20 companies issue yourself by looking for a resolution described in the article. If it is a complex 20 companies issue or you are unable to solve the issue, you may contact us by clicking here or by using other 20 companies support options.

For more information about resolving issues related to 20 companies in Quickbooks/QBO or to get support for the issue 'need more than 20 companies', click the link below: