Desktop TurboTax has forms mode, but Online TurboTax does not. Are you using Online TurboTax and asking how to get to the Form 2210 interview? If so, see if this is what you want:
- With your return interview open, go to the left menu column and click on TAX TOOLS, then subtab TOOLS.
- In the Tools Center screen choose blue button TOPIC SEARCH.
- In the topic search line enter Form 2210 without quotes.
- Make the selection in the list and either double-click it or click GO.