To clarify the details, do you mean that you sold a fund in an IRA and used the money to purchase another fund in the same IRA, without taking any money out of the IRA? If that's what you did, the sale is not taxable. You will not get a 1099-B or 1099-R for the sale, and you do not report it on your tax return.
If that's not exactly what you did, provide more details.
