This is what the IRS says........and it's not a straight forward answer.
How long should I keep records?
The length of time you should keep a document depends on the action, expense, or event which the document records. Generally, you must keep your records that support an item of income, deduction or credit shown on your tax return until the period of limitations for that tax return runs out.
The period of limitations is the period of time in which you can amend your tax return to claim a credit or refund, or the IRS can assess additional tax. The information below reflects the periods of limitations that apply to income tax returns. Unless otherwise stated, the years refer to the period after the return was filed. Returns filed before the due date are treated as filed on the due date.
Note: Keep copies of your filed tax returns. They help in preparing future tax returns and making computations if you file an amended return.
Period of Limitations that apply to income tax returns
- Keep records for 3 years if situations (4), (5), and (6) below do not apply to you.
- Keep records for 3 years from the date you filed your original return or 2 years from the date you paid the tax, whichever is later, if you file a claim for credit or refund after you file your return.
- Keep records for 7 years if you file a claim for a loss from worthless securities or bad debt deduction.
- Keep records for 6 years if you do not report income that you should report, and it is more than 25% of the gross income shown on your return.
- Keep records indefinitely if you do not file a return.
- Keep records indefinitely if you file a fraudulent return.
- Keep employment tax records for at least 4 years after the date that the tax becomes due or is paid, whichever is later.
https://www.irs.gov/Businesses/Small-Businesses-&-Self-Employed/How-long-should-I-keep-records
-------------
This is a bit easier to read..........
How Long Should I Keep My Tax Records?
By
Brian O'Connell
A:
The
Internal Revenue Service (IRS) has some hard and fast rules regarding how long taxpayers should keep their tax records.
As the IRS puts it, the duration of your tax record keeping depends on the “action, expense, or event” impacting those records.
Those actions, and those timelines, are important, as they impact the
statute of limitations on any amendments to your tax return, or the federal government’s ability to demand additional tax payments from you.
To comply with IRS documentation mandates, keep the following tax records for the following time periods:
Document Duration of Record Keeping
Federal tax returns At least three years
Reason: Uncle Sam only has three years to assess additional tax payments. On the flip side, taxpayers only have three years to make a claim they were entitled to, but did not receive. One exception: You need to keep page 1 of
Form 1040,
1040A, 1040NR or 1040-T if you ever made nondeductible contributions to a
traditional IRA and filed
Form 8606, until all distributions are made.
Investment forms At least seven years
Reason: The IRS wants taxpayers to hold on to
individual retirement account (IRA) documents, home sales paperwork and other key investments for seven years. The agency may need to go back that far to ascertain accurate payment on taxes owed on investment accounts.
Bank statements Two years
Reason: In general, bank statements and employment paycheck stubs need only be kept for two years.
If you have
under-reported any federal taxes, keep your tax documents from the past six years, starting with the year the taxes were under-reported. If you have failed to file a form, or filed a fraudulent form, don’t toss tax records away.
The IRS has a legal right to review them.
The period of limitations is the time in which you can
amend your tax return to claim a credit or refund, or the time in which the IRS can assess additional tax.
The following information contains the periods of limitations that apply to
income tax returns. Unless otherwise stated, the years refer to the period after the return was filed. Returns filed before the due date are treated as filed on the due date.
Note: Keep copies of your filed tax returns. They help in preparing future tax returns and making calculations if you file an amended return.
1. You owe additional tax and situations (2), (3), and (4), below, do not apply to you: Keep records for three years.
2. You do not report income that you should report, and it is more than 25% of the gross income shown on your return: Keep records for six years.
3. You file a
fraudulent return:
Keep records indefinitely.
4. You do not file a return:
Keep records indefinitely.
5. You file a claim for credit or refund after you file your return: Keep records for three years from the date you filed your original return or two years from the date you paid the tax, whichever is later.
6. You file a claim for a loss from worthless securities or bad debt deduction: Keep records for seven years.
7. Keep all employment tax records for at least four years after the date that the tax becomes due or is paid, whichever is later.
http://www.investopedia.com/ask/answers/020414/how-long-should-i-keep-my-tax-records.asp
-------
Why do they suggest that you keep bank records for 2 years and Investment forms for 7 years but Tax Returns for 3 years ? Why don't they just keep one rule for everything and suggest it be kept for 7 years ?
The rules for keeping documents is just as convoluted as the tax process.