Self employed

I mailed each payment in with the IL-1040-ES which had both our names and socials on it. 
I am filing separately I do not want to be held liable for anything down the road because we filed jointly. Like what happened in 2021. Because we filed jointly in 2020, I was gonna be held liable for him not paying in his estimated taxes for 2021. So I had to pay them. I don’t want to have to pay estimated taxes again for him. Just want to get back what I did pay in.