In Rev. Proc. 2018-19, the IRS reduced the fee for filing for a favorable determination letter on Form 5310 in conjunction with a plan termination from $3,000 to $2,300. The reduced fee is effective retroactively for all Forms 5310 filed on or after January 2, 2018. Filers who paid the $3,000 user fee will receive a $700 refund. View Rev. Proc. 2018-19.