A level further maths

Hi, I’ve chosen my A level subjects today. Maths, physics, further maths and wanted As level in French. I was told that the further maths and French will both be As level and I’ll sit an As exam next year but I can then continue with one or both of them as a full A level. I wanted this to be further maths. I just want to make sure this will be a full A level if I’ve sat it as an As originally and it won’t have impact on any university application. Thanks