Assuming you mean SSA-1099, try this.
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If you’re on the Hi TurboTax Client, let's keep working on your taxes! screen, click the Pick up where you left off button
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Click Federal in the left pane, if you’re not already there
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Click Income & Expenses in the banner
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Scroll down and click Show more to the right of Retirement Plans and Social Security
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Click Start or Revisit to the right of Social Security (SSA-1099, RRB-1099)
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Answer Yes on the Did you get a 1099-R in 2021? page
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Answer Yes on the Did you receive Social Security or Railroad Retirement benefits in 2021? page
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Enter all relevant information on the ensuing screens.