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.
The IRS can randomly audit you three years after you file â or six years afterward if it thinks you skipped out on reporting your income by at least 25%. Year-end account statements: These will show the cost basis for your investments, so you want to hold on to them for as long as you have the investment.