What should we do about the invoices we received after submitting the declaration?

What should we do about the invoices we received after submitting the declaration?

We approved the VAT declaration of a taxpayer. VAT payment of TRY 1.922 appeared.
We then realized that they have purchase invoices which they sent through Whatsapp. TRY 400 would occur if these invoices were entered.
What should we do in this case?

You have to submit a correction declaration.

Source: İSMMMO
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