First issue is what does new partner mean?  If you added  a partner to an already existing partnership  (or started a partnership), then what you are wanting to do is just not the way a partnership works.

Assuming new partner means a business arrangement with someone else, someone who is not […]

Resolution for 'business arrangement issue: 'I am distributing a line of products currently to 10 clients. My new partner sourced a new product, and I am adding it. We are sharing all expenses, how to separate?' available: Yes.

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

For more information about resolving issues related to business arrangement in Quickbooks/QBO or to get support for the issue 'I am distributing a line of products currently to 10 clients. My new partner sourced a new product, and I am adding it. We are sharing all expenses, how to separate?', click the link below: