My Federal Tax return refund is $1200 short of what I should have received. What should I do?

1200 sounds like the second Stimulus payment for married or Single with 1 dependent.  Was 1200 on line 30?

A common adjustment is if you claimed the Recovery rebate credit on 1040 line 30 when you already got the Stimulus payment or got the second one after you filed.  The IRS knows they already sent it to you.  But you tried to claim it again on your tax return.  

Thanks for the reply.  I need to know what to do about that since I entered incorrectly, must have mis-read the question.