Things that tax preparers need that clients forget to provide

Information on estimated tax payments made during the year. This must include the amounts and dates of the actual payments. If you were scheduled to make estimated payments and didn't, then simply let me know that no estimated payments were made.

Even if you list down the following income sources, I always want to see the source documents. There is information on these forms that must be reported to the Internal Revenue Service and potential additional income or expenses that you may not be aware of. Since the IRS has already received copies of these forms, omitting them from your data can create a serious problem.

  • All Copies of Form W-2 - (please do not tear them apart)
  • Form 1098 mortgage interest statement(s)
  • Pension distribution Form 1099-R (even when rolled over)
  • Unemployment compensation Form 1099-G
  • Form 1098-T (for tuition paid) & Form 1098-E (for student loan interest)
  • Form K-1 (from trusts, S-Corporations, LLC's and partnerships)
  • Gambling income forms and related gambling losses

Proper reporting of your investment income requires providing the following forms. Even if you simply redeemed a mutual fund or bond at the original cost, you must include the forms reflecting this transaction.

Year end summary for mutual funds and / or brokerage company (all pages please)Average cost statement (if you had any sales) / cost basis and purchase dates of shares sold.

  • Form 1099-B
  • Form 1099-INT
  • Form 1099-DIV

If you have sold stock and the cost basis is missing from the any of the above forms, please include the cost basis with the information you provide. If the cost basis is not on the forms, the brokerage firm does not know the amount, so it is up to you to determine what that is.

Any real estate closing document (HUD form 1) on real estate transactions (including mortgage refinancing) during the year (both buy and sale side of the transaction). Form 1099-S, if applicable, is helpful as well.

Massachusetts taxpayers - Don't forget the info on rent expense for renters and the health insurance information (Massachusetts form HC). Also amounts paid for tolls on the Mass Pike or Charley Cards

The amount of alimony that you have paid including the name and social security number of the alimony recipient in order to claim a deduction.