SNP data Download Help
I would recommend to do this in R, using biomaRt.

For example if you want all the SNPs from IDH1 (ENSG00000138413) gene:

library(biomaRt)

ensembl&lt;- useMart("ensembl")
ensembl &lt;- useDataset("hsapiens_gene_ensembl",mart=ensembl)

IDH1 &lt;- getBM(attributes=c('ensembl_gene_id','variation_name'), filters = 'ensembl_gene_id', values ="ENSG00000138413", mart = ensembl)

IDH1


You can add much more information, take a look at the help page of biomaRt.