Although you should generally keep tax records for 3 years from the date you file your return,you may be held responsible for providing back documentation up to:
A)3 years
B)4 years
C)5 years
D)6 years
E)10 years

Question

Quizplus · Accepted Answer

The IRS recommends keeping tax records for up to 6 years in case you have underreported your income by more than 25%, as they can audit your tax returns for up to 6 years back in such cases.

Although You Should Generally Keep Tax Records for 3 Years