Package validation on Web Filing is the same as in Electronic Filing (EFS). Validation rules applied are exactly the same
Locate and navigate to your Web Filing Package
On the package view page, click Validate Package
View the validation results
Validation messages with numbers are errors. Those without numbers are warnings.
The Notifications button on the side bar accesses the notice on the myLTSA Inbox
Make the necessary corrections, then rerun the validation check. Click Validate Package
Continue on to submit the package