converting part of a standard IRA to a Roth IRA.

I am going to convert part of my standard IRAs from standard to Roths.  To decide how much to convert for 2020 I am trying to use a copy of my 2019 return.  I am changing the amount on one of the 1099-Rs but I need to change box 7 from RMD to something else.  What do I use?  I'm thinking #7 but I'm really not sure.  Please help.