If the mutual funds were transferred in-kind via an ACAT (account transfer) then no reporting is necessary.
If the mutual funds were sold and then repurchased, then yes. You would receive a 1099-B from the old brokerage that would need to be reported here:
Federal Taxes > Income
& Expenses > Investment Income, then click Show More
Select Start next
to Stocks, Mutual Funds, Bonds, Other
