State tax filing

I'm not sure if your online, or have a desktop version, but I would start with anything that had withholdings.  Typically, a W-2, or 1099-R.  

Then I suggest checking estimated payment information.

This is a guide to get into these areas.

W-2 posting online

1. Start out at Federal 
2. Wages & Income 
3. Select Wages and Salaries, or Revisit
4. Select add a W-2 for the appropriate person if married.
5. Post the tax ID number for the employer
6. If you want to import the W-2, enter the value from box 1 of the W-2
   1. Follow instructions for the import.
7. ------------To Type it Yourself---------------------   I suggest this option
8. Select [Change how I enter my form]
9. [Type it Myself]

1099-R Posting Online

1. Select Federal 
2. Wages & Income 
3. Select Wages and Salaries, or Revisit 
4. Scroll to Retirement Plans and Social Security
5. Select the type of income.
   1. IRA, 401(k), Pension Plan Withdrawals (1099-R)
   2. Social Security (SSA-1099, RRB-1099)
   3. Canadian Registered Pension Income
6. At this point you can edit an existing document of [Add another 1099-R]
7. If a new 1099-R continue to Let's import your tax info
8.  You can import by selecting your provider. 
   1. Follow the instructions.
9. —----  Or to post manually —-------  Suggested
10. [Change how I enter my form]
11. [Type it Myself]

Estimated taxes posting

1. Go to Deductions & Credits.
2. Under Your Tax Breaks 
3. Scroll down to Estimates and Other Taxes Paid.
4. Select Estimated tax payments from the Drop-Down
5. Then Federal Estimated taxes ...