As for start up costs if you filed with TurboTax last year the amortized cost should automatically be carried forward to this years return. If they do not carry forward then you will need to enter the annual amortized amount manually.
The business startup deduction can be claimed in the tax year the business became active.
However, if you anticipate showing a loss for the first few years, consider amortizing the deductions to offset profits in later years. This would require filing IRS form 4562 in your first year of business.
You can choose from different amortization schedules, but once you have selected a schedule, you can't change it.
-follow this link for more information-
Startup Business Tax Tips - TurboTax Tax Tips & Videos