The 2020 Form 1099-R for distributions from the mutual fund that will get reported on your 2020 tax return will include the portion of the 2019 RMD taken in 2020 plus whatever portion of the 2020 RMD is taken from that account before the end of 2020. As fanfare implied, only the distribution that occurred in 2019 gets reported on your 2019 tax return.
Note that most IRA CDs permit distributions of RMDs without incurring a CD early-withdrawal penalty. If you would rather take an RMD from the CD, check the CD IRA agreement to see if this particular CD IRA allows this.
