You cannot do so from within QB as at least one line item is required.

WORKAROUND> Open a blank estimate. Hit CtrlP (Ctrl + P) for printing and print your blank.

Resolution for 'blank estimate issue: 'How do I print a blank estimate?' available: Yes.

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

For more information about resolving issues related to blank estimate in Quickbooks/QBO or to get support for the issue 'How do I print a blank estimate?', click the link below: