QB Issue Resolution:

From the home page screen

Select the Company Gear (located at upper-corner)
Select “Switch Company” under Your Company heading
It will take you to login screen with the following messages:
Company Selection
Our records show that you have access to more than one company, or multiple users in the same company.
If you do not see it, you do not have access to multiple company subscriptions from here.

Resolution for Issue 'I am balancing the deposits for two separate companies and I have one quickbooks account. How do I switch from one to the other?' available: Yes (Solved).
Source: Intuit Community forum.

I am balancing the deposits for two separate companies and I have one quickbooks account. How do I switch from one to the other?: 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 Company
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