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submitted my returns for 23018 and 2019 late

irs returned 2019 with green form #3531, said the return was   not signed, also shows circled  "total income" 7 b shows -$12,477, . Then attach supporting documents for your entry of $4,631 for federal income tax withheld. This may be a form w2, form w2g, form1099 or substitute form w 2  for example a copy of an earning statement with year end totals

So not  sure whats this means, as I followed the fill in process with forms I had in my possession. It also says not to sign green form but assuming 

but how do I get on live????

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