Review this IRS website for the penalty and how to remove or reduce the penalty - https://www.irs.gov/payments/underpayment-of-estimated-tax-by-individuals-penalty
If you are using the TurboTax desktop editions, then you can access the Form 2210 using Forms mode. Click on Forms. When in Forms mode click on Open Form at the top left of the screen. Type in 2210 and then click on the result to open the form.
If you are using the TurboTax online editions, then you will have to complete the Form 2210 using the IRS website.
Go to this IRS website for the Form 2210 - https://www.irs.gov/pub/irs-pdf/f2210.pdf
Go to this IRS website for the Form 2210 Instructions - https://www.irs.gov/pub/irs-pdf/i2210.pdf
