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Kagome magnets are an interesting class of materials and an ideal platform to study the interplay between topology, magnetism, and electronic correlation. YMn₆Sn₆ is one such compound which orders with a commensurate antiferromagnetic helical structure below 345 K and exhibits an incommensurate double helical structure (DH) upon further cooling. Previous studies have shown that YMn₆Sn_6-xGa_x evolves from incommensurate antiferromagnet to ferromagnet for x>0.2, but its microscopic origin has remained unclear. Here, we will talk about the role of Ga doping on the electronic and magnetic properties for YMn₆Sn_6-xGa_x (x~1).