If you sold stocks from a normal brokerage account and then reinvested back into an IRA, then this is a taxable event even if you reinvested the amount in an IRA. Even if you don't receive cash, the gain made on sale of stocks is a taxable event even if you reinvest that amount. However, if these stocks were traded within an IRA, then those earnings would not be taxed now but may be taxed later on depending on the type of an IRA.
