Currently, the Denneroll is available in three sizesâfor tall or flexible adults (gray Denneroll), average or stiffer adults (white Denneroll), and small adults or pediatric patients (gold Denneroll)âthe Denneroll Cervical Orthotic Device is an important addition to your patient-care inventory.
Length of time to keep, and why:Seven years. 1  The IRS has three years from your filing date to audit your return if it suspects good-faith errors. 2  The three-year deadline also applies if you discover a mistake in your return and decide to file an amended return to claim a refund.
1 Bank Statements (Unless needed for tax purposes and then you need to keep for 3 years). 2  Quarterly Investment Statements (Hold on to until you get your annual statement). 3  Income Tax Returns (Please keep in mind that you can be audited by the IRS for no reason up to three years after you filed a tax return. Income Tax Returns (Please keep in mind that you can be audited by the IRS for no reason up to three years after you filed a tax return. 2  If you omit 25% of your gross income that goes up to 6 years and if you don't file a tax return at all, there is no statute of limitations.).