I have never heard of either desktop of QBO being compatible with the compact (voucher on the side) checks.

Resolution for 'compact business checks issue: 'I have Harland compact business checks (3 to page with voucher on left side). Can I use these checks? Harland claims they are compatible with Quickbooks Online' available: Yes.

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

For more information about resolving issues related to compact business checks in Quickbooks/QBO or to get support for the issue 'I have Harland compact business checks (3 to page with voucher on left side). Can I use these checks? Harland claims they are compatible with Quickbooks Online', click the link below: