Key value from a reference column

[ATR]

I’m trying to use reference call to return a key column from another table.
I tried SELECT() formula, REFROWS, and the refference formula and got nothing. The table that has the key column is this one above:

And i want to autocompute on another table (bellow) the existing key values “Código de Notas”

The actual formula i’m trying is:

NotasData[Cod. Req].[Código Notas]