Dear Mr. Yusuke,
I’m sorry to tell you that we must decide within today.
Because I don’t think it will be problem. Today is the last day to submit.
If I knew it was a problem. We can split Credit note for 2 month. It is not negative.
However, if we choose 1st way officials want to check all document such as,
1. Causes of the reduction debt.
2. How to calculate cost of goods sold.
3. The accuracy of the purchase tax invoice. (Input Vat) etc.
If we choose 2nd way we did not loss the money(cash). But we loss purchase tax to used offset sale tax in the future only (28,953.82 THB.)
We may not be able to claim the loss from customer.