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.
4. Seven Year Rule for Record Retention(general rule). The rules on how long to keep financial records varies depending on what you are saving. For up to date tax filings, 7 years is a safe rule of thumb.Some people might say that is too long, but it is easier to follow this rule than to have to keep track how long you should keep different info.We suggest you keep tax returns for the life of your company. Scan them and save them both on and off site..or up to date tax filings, 7 years is a safe rule of thumb. Some people might say that is too long, but it is easier to follow this rule than to have to keep track how long you should keep different info. We suggest you keep tax returns for the life of your company. Scan them and save them both on and off site..