UNKOWN TDS CLAIM IN INCOME TAX RETURN

I have claim unknown TDS in my income tax return in FY-17-18 As per form 26 AS. and taken refund and after 5 years this credit is Nil in my 26 AS. so what can i do in this situation.. Please suggest  me i am ready for pay whole amount with interest and penalty  but i am worried about Prosecution and jail... please help me 

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