As far as I know, this is still not possible with QBO, but you might want to check out add-on apps like this one:
Resolution for 'addon apps issue: 'Set up checks to print with signiture' available: Yes.
The addon apps 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 addon apps issue yourself by looking for a resolution described in the article. If it is a complex addon apps issue or you are unable to solve the issue, you may contact us by clicking here or by using other addon apps support options.
For more information about resolving issues related to addon apps in Quickbooks/QBO or to get support for the issue 'Set up checks to print with signiture', click the link below: