Thank you so much for your answer.   Great help.   My apologies for the confusing second question.  I meant to say “income”.  

There is a phase out for the amount you're entitled to, from 75-100K for single and 150-200k for married joint, for every $100 over the lower threshold amount, they reduce the stimulus by $5.

I think this somewhat addresses my concern, but not quite.   In my particular case,  my client had a total income of $56k yet the full ($1,800) amount was deducted.  ( Ie. Client had a tentative refund of $1,500.  After I entered the $1,800 stimulus checks now shows she owes the IRS $300.   What am I doing wrong????