Where do I enter state income tax withheld, as reported on Schedule K-1, form 1120-S?

Use the following steps:

• On the top row of the TurboTax online screen, click on Search (or for CD/downloaded TurboTax locate the search box in the upper right corner) 
• This opens a box where you can type in “other withholding” (be sure to enter exactly as shown here) and click the  magnifying glass (or for CD/downloaded TurboTax, click Find)
• The search results will give you an option to “Jump to other withholding”
• Click on the blue “Jump to other withholding” link 
• Scroll down to Other Income Taxes Paid in 2021
• Click Start beside Withholding not already entered on a W-2 or 1099 to enter your information