If TurboTax is asking you to choose the applicable percentage for Section 1202 gains, it appears that you may have entered a Form 1099-DIV that showed Section 1202 gain in Box 2c.
The exclusion percentage question comes up if you have an entry in Box 2c of Form 1099-DIV. If it's zero, delete the entry in Box 2c because that code section does not apply.
Internal Revenue Code section 1202 says a portion of the gain from the sale of Qualified Small Business Stock (QSBS) reported on 2c is excludable if the stock was held for more than 5 years.
See this help article and the IRS instructions for Form 1099-DIV for more information.
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