Which option are you and your spouse choosing this year? - Married Filing Separately

Hi, 

 

I was married at the end of 2020. For 2020 taxes, my parents' spouse wants to file him as a dependent in their 2020 taxes. So I have to choose the Married Filing Separately option. There is a question that asked "Which option are you and your spouse choosing this year?" How can I answer this?

 

Thank you so much for all the help!