I encounter my first problem with the CTC Child Tax Credit. Need some guidance, My client is Separated/Divorce, the parents of the child alternate years to claim CTC. Jhon(father) is claiming the child this tax year 2021, he did not received/claimed the advance child credit during 2021 because Jane(mother) was the one who claimed the child on 2020 taxes, therefore Jane(mother) received $1600 of the $3600. 

The problem I encounter is that in form 8812 for Jhon (father) there is not an option that can show that the Jane(mother) was the one who received the $1600. The mother received the IRS letter 6419 but Jhon did not because he never received the advance CTC. Therefore, do I put 0 on in form 8812 for Jhon (father) ? if I put 0 for the Advance CTC amount Jhon will get $3600 CTC. That would be incorrect since half of CTC credit has been received already by Jane(mom). 

Help