Follow the new submission process to submit resubmissions on the journal website. A resubmitted manuscript may fall into one of two categories:
Manuscripts resubmitted in response to encouragement to resubmit following a decision to reject. The author would receive clear guidance on what revisions are required and the conditions under which their manuscript will be reconsidered for possible acceptance. There is thus an agreement framework in place.
The editor is under no such agreement and may view the manuscript as a completely new submission.