social securtiy tax for green card

Hi all,

During the opt period, no social security tax need to be withdrawed. When I
got my H1B visa, my employer forgot to withdraw social security tax from my pay
check. Will this affect my green card application? I just got my labor certification and I will submit my 140 application soon. When I apply I-485, do I need to provide tax information and how many years? Is it ok if I ask my
employer to withdraw my social security tax no?

Thanks a lot!