Trying to fix past tax return. Single/unemployed have dependent, still owe $1500.?

Hi, thank you in advance for your help. So in 2021 my husband filed for me, put me in as single (we were getting divorced). I did not work that year due to taking care of dying father. I was not on unemployment either... I did try to get health insurance through healthcare.gov for 4 months but it was cancelled because I couldn't afford it monthly. When u filed the IRS denied my taxes and sent them back and told em I owed them 1500$. I have no idea what or why. I tried an amended return for that year 2021 and it said I was to receive 3k. So I resent it and once again they said I was wrong and that I owed 1500$. How could I owe that much when I didn't even work and I also have a dependent? I can not get  in contact with TurboTax to help either.  I've been trying to fix this for years.