The TurboTax online returns for tax year 2015 have shut down to make way for the 2016 online editions.
If you paid for one of the 2015 online editions of Plus, Deluxe, Premier or Home and Business, then you will need to contact TurboTax support and speak with an agent to get a 2015 desktop installation file pushed to your download account.
If you did not pay for one of the 2015 online editions or only used the Free edition, then see this TurboTax support FAQ for completing a prior year return started with the online editions - https://ttlc.intuit.com/questions/2559403-how-do-i-finish-a-prior-year-return-that-i-started-in-turb...
Download the tax data file from your 2015 online Timeline and then open the file with the 2015 desktop program. See screenshot
For estimated taxes -
- Click on Federal Taxes
- Click on Other Tax Situations
- Under Other Tax Forms
- On W-4 and estimated taxes, click the start or update button
See this TurboTax support FAQ for a contact link and hours of operation - https://ttlc.intuit.com/questions/1899263-what-is-the-turbotax-phone-number
To contact TurboTax customer service/support use their contact website during business hours.
Submit your question/problem during business hours and then use the option for Call (a phone number will be provided for Call) to speak directly with a TurboTax agent -
https://support.turbotax.intuit.com/contact/
Note: The Call option will not be available when TurboTax Support is closed.
You can also go to this IRS website for the 2016 Form 1040-ES and use the worksheet included to estimate your taxes - https://www.irs.gov/pub/irs-prior/f1040es--2016.pdf
You can use this IRS website for several options on paying taxes - https://www.irs.gov/payments
