The client and his girlfriend live together, the kids belong to both the client and the clients girlfriend. They all reside together. Normally the mom (clients gf) claims them, but in 2020 , she didnt work or collect unemployment. because she claimed them in 2019 and 2018, she received stimulus for the kids already.  Because he is claiming them this year, the recovery credit wants to calculate for the kids, giving him a credit for them, how do prevent it from calculating the kids in the credit?

I hope this cleared up what I'm asking.