If you've been using TurboTax, there is a form entitled "Form 4562 Depreciation and Amortization Report" which will show your accumulated depreciation figure.
If you used some other income tax preparation software, the form may vary from what TurboTax offers and the form would typically be for your records only; you would not file it with the IRS.
Frankly, you should know the total amount you deducted since the best practice is to keep a record outside of TurboTax, or any other income tax preparation program.