Deductions & credits

Both my wife and I signed into the IRS online account through ID.me, and verified they had 1000 for both of us under advanced child tax credit.   I only received 3 checks of 333$ totaling 1000 only, not 2000.  The checks were written to both me and my wife, as I had to have her endorse as well as me.  They are incorrect in what they say they sent us.    1) since I owe over 10K, is there much harm in just reporting the real amount of 1000 vs the 2000, I will just pay them 1000 less.  I can still do the trace form, but I feel better if I hold the money and not them.  2) would this cause an audit or any other punitive action by the IRS.  3) will the return be rejected?