Tds

Suppose, A Ltd pays interest to B Ltd of Rs. 100000 by deducting 10000 TDS on Interest uner section 194A. The TDS payable is also paid to the credit of government. Suppose after 2 months, A Ltd and B Ltd come to an agreement to reduce interest to 80000 retrospectively. Since i have dedcted and paid TDS of 10000 whereas my actual should have been 8000. What options do i have for the 2000 TDS excess deducted and paid. ? Can i adjust it while paying TDS next month?