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In 1993 we bought 132 B shares of a fund & reinvested all dividends.  In 2005 the B shares plus dividends were exchanged for A shares in a tax-free transaction all dividends reinvested & no sales.  In 2018 we sold 164 shares.  Our 1099B shows the sale of the original 132 B shares & 32 of the A shares.  I think that since the B shares were exchanged, all of the 164 sold shares should be A shares.  Am I wrong?