The following resources can be used to help you file petitions.
The Petition Filing webinar explains how to file a quality petition.
Training and Employment Notice (TEN) 23-14 provides instructions for filing a petition. The revised illustration can be found here on the USDOL site.
See also the Frequently Asked Questions about filing petitions from the TAA website.
The ITC webinar has resources for filing petitions for industries that have been deemed by the International Trade Commission to be materially injured. There is an associated ITC FAQ.
Finally, here is a fact sheet on how Tariffs and TAA connect.