Your question is nonsensical, kind of like asking where the four corners of the earth are. There is no center of the Universe. Space-time is curved.
==There is no center of the Universe.
Actually, even the Big Bangers admit that the Universe appears to have a center, and that our solar system appears to be close to it. They also admit that they threw this out of their cosmology for ideological, not scientific, reasons. According to them, it would make earth appear to be “too special.”