we can't see the return so we don't know what you did wrong.  there are many line items that must be entered directly in the worksheets so the flow to schedule L..  we don't know what assets and liabilities you have and schedule L has 25 lines other than totals.  the balances on it should be end of year.  

most common:

cash line 1 

buildings and related accumulated depreciation which should match up with form 4562 line 10

capital stock - what you told the state you were going to issue and the amount you put into the corp for it. line 25

retained earnings. (for new corps really the accumulated adjustment a/c which should match schedule M-2) line 😎 which is net profit (regardless of whether certain expenses weren't deductible) less distributions to shareholders.

hope you filed an extension because this return was due 3/15/2020 if extended 9/15/2020. penalties are about $200/mo /shareholder /month late.

even if you can figure it out you certainly should see a pro.  S-Corps and its shareholders have many laws that affect them. mess up and if the IRS catches it, you could regret it.   there are not only tax laws but other laws may be in play such as the need for workmen's comp insurance.  even if you are the only employee.  then there the ned to take a salary and file payroll tax returns.