Balance on Sales and Purchase TAX Control Account

After last submited return I have balance on Sales and Purchase Tax Control Account.
It looks like the balance is carried forvard from the time we started using QF in 2015.
At that time the VAT quarter didn’m match year end and I posted lots of transaction manualy to the above accounts when we moved form other system.
Now I can se the balances on the above account but have no idea which are the corespodnding figurs and how to clean that balances.
Any advice please?

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