I filled an extension with a payment. How do I add the payment to my current filing.

Here's how to navigate to the place to enter the extension payment you made so you get credit for it on your 2016 return.   If you used TurboTax to file the extension, it *might* be prepopulated, but you should check anyway.

• Under the Federal Taxes tab (or Personal tab in Home and Business)
• Click subtab "Deductions & Credits."
• "I'll choose what I work on." (or in Online TurboTax it may say "All tax breaks.")
• Scroll down to topic "Estimates and Other Taxes Paid."
• Find subtopic OTHER INCOME TAXES, and click START or Update/Revisit.
• On the "Other Income Taxes" screen choose the type of extension payment  you made and click START (or Update).  Be sure you choose the correct year.
• Continue the rest of that section.

Once you have entered the extension payment (or confirmed it if it's prepopulated), then before filing verify that you are getting credit for it.    

• If filing a Form 1040, look at Line 70 of your Form 1040 and verify that the Federal figure is correct.
• If filing a Form 1040A, look to see if the amount is included on Line 46, and "Form 4868" is written near the Line.  
  
• If filing a 1040EZ, look to see if the amount is included on Line 9, and "Form 4868" is written near the line.  
  

A state extension payment is entered in the same navigation steps as above.   After entering as above, then click on the State Taxes tab and step through the state return to ensure it transfers over to the state return.  Verify that it appears on the state return prior to filing.