if you weren't married on 12/31/020 she is not your spouse. since she is not related the criteria for qualifying relative would have to be met to claim her as a dependent
Qualifying Relative
1) most have lived with you for all of 2020
2) gross income for 2020 less than $4,300
3) you provide over ½ his support
4) isn’t a qualifying child of another taxpayer
