ITIN not received due to pending TAX processing from IRS and for 2020 what is the next step?

Hi, I applied for ITIN but it was returned as my paper submitted returned was still not processed by IRS fedral taxation which is my first time. What shall I do while filing 2020 tax returns? 

 

Options:

1) I should not take child tax credit benefits and just complete online efilling to process faster then resubmit the ITIN application so ITIN can be processed successfully. Later, I can amend my Tax returns of 2020 and claim the child tax

2) Claim for Child tax credit and submit the return with paper which longer process. In this can I submit ITIN application form in the same envelope? 

 

Need some suggestions, thanks.