Dynamic text values base on slicer

HI All

I need to create some helper/parametric table. This table should be used as header in matrix visual.

Currently, i have created a table, which i can use as matrix header, but the table is "static", and i need that some values contains text based on some slicers.

the actual table looks like 

Table_1=
{
("1","Actual Forecast"),
("2", "Actual Budget"),
("3", "Forecast previous year"),
("4","Forecast before 2 years")

}
I have a slicer, were the user can select the year(actual) and from this are calculated values for Actual year-1, Actual year-2,...
these values, and other values, are calcualted as measures from other values in table (this could not be calculated in M query, becuase some these values in the table are also calculated base on some filter, slicers,... set by the user).

The question is, how to create the helper/parametrical table, so that some text values contains values base on the slicer selection.  For example, when actual year is selecte 2021 instead of "Forecast previous year" I want to have text "Forecast Year 2020", and "Forecast before 2 years" sould be "Forecast Year 2019".
Wanted to use SELECTEDVALUE, but this not work in table constructor.

Thank you