Why early matters more than it seems
The cost of a tax preparation engagement is driven substantially by how much reconstruction it requires. A complete set of records is a review; an incomplete one is an investigation, and it is billed accordingly.
Gathering early also leaves time to request anything missing. A document you need from an institution takes days or weeks to arrive, and that is a different problem in November than in the final week.
Income records
The categories are broadly consistent even though the specific forms differ by jurisdiction.
- Employment income statements from every employer during the period.
- Self-employment or contract income, with the records behind the totals.
- Investment income — dividends, interest, and records of anything sold during the period.
- Rental income and the expenses against it.
- Retirement, pension or benefit income statements.
Deduction and credit records
What is deductible varies enormously by jurisdiction and circumstance. What does not vary is that a deduction you cannot document is a deduction you cannot safely take.
- Business expenses, with receipts organized rather than accumulated.
- Charitable contributions and their acknowledgements.
- Interest statements for mortgages, student loans or business borrowing.
- Health, childcare or education costs, where these are relevant to you.
- Records of estimated payments already made during the period.
Last year's return
The prior return is the single most useful document to have to hand. It tells a preparer what applied to you last time, what carried forward, and what to ask about — and it makes the first conversation dramatically shorter.
What this is not
This is a general list of what tends to be requested. It is not a determination of what applies to you, what is deductible in your situation, or what you owe.
Tax treatment is jurisdiction-specific and fact-specific, and determining it is the work of a qualified tax professional. Neither this article nor any software here decides your tax position.
This is general education, not advice about your situation. It does not decide anything about your credit, taxes, borrowing or legal position — those belong to you and to the qualified professionals you work with.