Amended return

Hi Turbo Tax, 

 

I filed my return and it said I would receive $2,000 back but I haven’t received this amount. 
Then the IRS asked me to submit the forms 8692 and 1095A. I mailed them already. 
Later on, I filed an amending return and I owe $500. 
Do I have to mail the amended return along with the check for $500 right away, or wait for the $2,000 above then mail the amended return and the $500 check?

 

Thank you.