My son [PII removed] is going to use Turbo tax to file taxes tomorrow with me, last year i helped him file and he never got his check of $700.

how do we put the claim to get that check? thank you My son is disable and I help him to do his taxes.  we always use Turba tax bc is very easy but last year he didn't get his check from the IRS and we don't know how to get it or claim it.  thank you