Child tax credit back pay
My son was born in 2018 the hospital made a mistake on his birth certificate we were unable to get his social Security card I have to file taxes but was not able to add him because he had no social security number but now I have his social security number I went and did Amendment but want to know how do I start getting child tax credit and is there back pay for the time the pandemic started to now that I can get since I did not have his social then but I have it now