You have to work within the constraints that intuit created when they programmed the software

QBO is so limited in customization I can not even think of a work around, the invoice number will have to be changed to fit the character limitations

Resolution for 'character limitations issue: 'Invoice number is too long in Section: 6 Invoice Number must not exceed 16 characters. Our invoice format is TL/IND/19-20/INV/1020' available: Yes.

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

For more information about resolving issues related to character limitations in Quickbooks/QBO or to get support for the issue 'Invoice number is too long in Section: 6 Invoice Number must not exceed 16 characters. Our invoice format is TL/IND/19-20/INV/1020', click the link below: