You can’t change how QB does this.  RazorSync should know that QB’s addresses are the full mailing address and not assume the first line is an address, which goes against how QB works.

Resolution for 'address field issue: 'How do you prevent QB from populating customer name in address field?' available: Yes.

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

For more information about resolving issues related to address field in Quickbooks/QBO or to get support for the issue 'How do you prevent QB from populating customer name in address field?', click the link below: