Label the return you actually hold
A year folder may contain several drafts, a final copy, and different submission records. Identify the authority, period, and status of each item before combining figures in a summary. Keep the evidence of filing separate from the fact that a copy exists. An attractive-looking packet should not conceal an unresolved question about what was submitted.
Use cross-references thoughtfully
Some source statements may support work on both returns. Keep a stable reference to the source, then document where it was used. If a working figure differs between records, write down the question rather than silently changing an original to make the files match. The appropriate treatment requires the individual facts and current rules, not a formatting decision.
Give review its own checkpoint
Before preparation or correction work is proposed, ask which record difference needs examination and what supporting information would answer it. Clarify who prepares, reviews, and submits the material for each authority. Retain the versions actually used and their confirmations. This two-file method makes a conversation more precise without determining filing obligations, tax treatment, or acceptance.