In this menu you can change an existing tax key. The
dialog looks like the entry-mask, but you can´t change
the tax key. All other dates of this tax key can be
changed now.

Additionally to the normal keys of a dialog-box you can
close this box with <ESC>. The <RETURN>-key (on the
numeric-keyboard, too) has two different functions. At
first it works like the <TAB> key. The "Entry" button will
be framed simple. If you are in the text-field, this
button is framed double. Now the <RETURN> key executes
the entry.