Ohio Sale Tax Delinquency notice?

Today I received two letters. 1.) From Department of Taxation and asking for $3000.40 for Sale tax audit Type Delinquency for reporting period 04/01/2019 to 04/30/2019. 2.) I received one more letter from Office of the Ohio attorney General, collection enforcement section and asking me to pay $3335.55 for sales tax... show more Today I received two letters.
1.) From Department of Taxation and asking for $3000.40 for Sale tax audit Type Delinquency for reporting period 04/01/2019 to 04/30/2019.
2.) I received one more letter from Office of the Ohio attorney General, collection enforcement section and asking me to pay $3335.55 for sales tax of department of taxation for period 01/19-01/19.

My business pays bi-annually sales taxes and all taxes are paid on time for all sales in Ohio at the rate of Hamilton County.
What I should do.
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