If you select “Service Date” instead of your own column, you are Assigning that you would like to use a Provided column that already is Defined as date-related and that provides the calendar icon.
Resolution for 'calendar icon issue: 'Can I add a calendar to a date column I have created in an invoice' available: Yes.
The calendar icon 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 calendar icon issue yourself by looking for a resolution described in the article. If it is a complex calendar icon issue or you are unable to solve the issue, you may contact us by clicking here or by using other calendar icon support options.
For more information about resolving issues related to calendar icon in Quickbooks/QBO or to get support for the issue 'Can I add a calendar to a date column I have created in an invoice', click the link below: