When the time comes to prepare your taxes, certain financial documents are necessary to file accurately. Some documents will be those that you already have on hand after careful collecting throughout the year, while others may be mailed to you right before tax time.1. Income documentationW2s, 1099s, and paystubs2. Prior tax payments3. Supporting documentationReceipts, bills, and bank statementsEven if a document is not needed for your tax return, that does not mean it should be disposed of without consideration. Nontax documents should still be held on to for an appropriate amount of time in case they are needed for other purposes such as insurance documentation or credit.