It should be automatic. Check 1040 Schedule 3 line 10 for it. Then Schedule 3 goes to 1040 line 31.
Did you have more than 1 Employer? If you had more than 1 employer and paid more than $8,537.40 in social security tax (box 4) combined you get the excess back on your tax return. And the max is per each person not together for a Joint return. So be sure to assign each W2 to the right spouse.
