There is no limit to the number of year. The instructions for the form specifically state "You must file Form
8379 for each year you meet this condition
and want your portion of any offset refunded."
Form 8379 Injured Spouse Allocation form is entered in this
area:
-
Federal Taxes tab (Personal Tab in the Home
& Business version of TurboTax)
- Other Tax Situations
- scroll down to Other Tax Forms
- then, Miscellaneous Tax form (select Start or Update)
- then, Report an Injured or Innocent
spouse claim (select
Start)
Here is an IRS article "Seven Facts
About Injured Spouse Relief" that my interest you
IRS Injured Spouse Relief
Also, see these IRS Form 8379 Injured Spouse and Instructions Form 8379 Allocation .