The first submission checklist: every file, statement, and field.

A journal submission checklist for a first-time author has three layers: the files you upload (manuscript, title page, figures, tables, supplementary material, cover letter), the statements you declare (funding, ethics, author contributions, data availability, competing interests), and the metadata fields you type into the system (full title, short title, abstract, keywords, ORCID iDs, co-author details). The journal's guide for authors lists all three, and the submission system asks for them one screen at a time. Miss one piece and the package usually comes back before any editor reads a word.

What files do I need to submit to a journal?

Plan on six uploads: the manuscript file, a title page, figures, tables, supplementary material, and a cover letter. Some journals merge several of these into one document; the guide for authors says which.

The manuscript file has an expected internal order, and journals check it. PLOS ONE spells its version out: "Manuscript must include, in order: Title page, Abstract, Introduction (beginning section); Materials and Methods, Results, Discussion, Conclusions (middle section, any order); Acknowledgments, References, Supporting information captions (ending section)." Other journals shuffle the middle, but the shape holds everywhere: front matter, body, back matter, in that sequence.

Figures and tables split journals into two camps. Some want everything embedded in the manuscript; others want each figure as its own upload, in a named format at a minimum resolution. Check before you export anything. Redoing figure files is the slowest fix on this list.

The cover letter is the one file you write from scratch on submission week. PLOS ONE puts its limit in writing: "The cover letter length limit is 1 page." Four sentences carry it, and the structure is learnable in ten minutes.

Which statements do journals require?

Four statements appear on almost every submission form: funding, ethics, author contributions, and data availability. Most journals add a competing interests declaration on top.

Funding carries a placement trap. Where you disclose the money matters as much as whether you do. PLOS ONE again: "Do not include funding sources in the Acknowledgments or anywhere else in the manuscript file; funding information should only be entered in the financial disclosure section of the submission system." Writing your grant number into the Acknowledgments feels natural. That is exactly what the rule forbids.

Ethics is shorter but stricter. If the study involved human participants or animals, name the approving committee and the approval number in the manuscript. If the work needed no approval, check whether the journal still wants a sentence saying so; many forms will not let you skip the field.

Author contributions now usually means CRediT, a standard taxonomy of contributor roles. PLOS ONE's rule reads: "Provide at minimum one contribution for each author in the submission system using the CRediT taxonomy." Sorting five co-authors into roles takes longer than it sounds, so start from copy-ready examples for each role rather than from a blank field.

Data availability asks one question: where can a reader find the data behind the results? The safest answer names a repository and an identifier. A vague "available on request" invites a follow-up question from the editorial office, which is another round trip you do not need.

Which metadata fields trip up new authors?

Three fields hide limits: the full title, the short title, and the abstract. At PLOS ONE the caps are written down. "Full title must not exceed 250 characters." "Short title must not exceed 100 characters." "The Abstract should not exceed 300 words." The system enforces these at the field level, so an over-length title stops you mid-form.

Abstract limits differ sharply between journals, from 150 words to 300 depending on the target, so the version you wrote for one journal rarely fits the next. Trim it before you open the form, not inside a countdown box.

Two fields deserve preparation days before you submit. First, expect the system to ask for an ORCID iD, at least for the corresponding author; registering one takes minutes but verification emails do not always arrive fast, and you do not want to wait on one mid-form. Second, gather every co-author's full name, affiliation, and email exactly as they should appear. Many systems email each co-author to confirm authorship, and one stale address can stall the whole submission.

Then come keywords and, at some journals, suggested reviewers. For reviewers, avoid recent co-authors and anyone at your institution. Editors check.

What happens if my submission is incomplete?

The editorial office sends it back to your queue with a note listing what is missing or misformatted, and the clock resets. Nothing has been judged.

Before an editor is assigned, journal staff check the package against the same artifact list this post walks through: files present, statements filled, fields within limits. A return at this stage is administrative. A desk rejection is a different event entirely, an editorial decision about fit or quality. Confusing the two causes first-time authors real anguish over what is, in effect, a form asking to be completed.

The cost is time. Each return is a round trip of days, sometimes longer over holidays, and your paper does not enter the queue for review until the package clears. Because these checks are mechanical, they can run before submission instead of after: a manuscript review against the target journal's own rules flags the missing statement or the over-length abstract while the fix is still cheap.

The one-page checklist

Copy this into the top of your submission folder and strike items as you go.

Files ready to upload:

• Manuscript file, sections in the journal's required order, line numbers on if required
• Title page naming all authors and affiliations, corresponding author marked
• Figures in the required format, embedded or separate per the guide
• Tables handled the same way
• Supplementary files, each named and captioned
• Cover letter, kept to one page

Statements drafted:

• Funding disclosed where the journal says, and only there
• Ethics approval with committee name and number, or a line saying none was needed
• Author contributions, at least one CRediT role per author where required
• Data availability naming a location and an identifier
• Competing interests, even when the answer is none

Fields prepared:

• Full title and short title inside the character caps
• Abstract inside the word limit for this journal
• Keywords chosen
• ORCID iD registered and verified
• Every co-author's name, affiliation, and working email collected
• Suggested reviewers with no recent co-authorship or shared institution

Every item on this list can be checked in an afternoon. The science took you a year or more. Give the packaging its afternoon, and the first email back from the journal is far more likely to say "with the editor" than "returned to author."