Installed payment for Corporate Income tax and Trade/Profit tax should be paid:

1st Quarterly Installment:	15th of the third month (e.g. 15th March)
2nd Quarterly Installment:	15th of the sixth month (e.g. 15 June)
3rd Quarterly Installment:	15th of the ninth month (e.g. 15 September)
4th Quarterly Installment:	15th of the twelfth month (e.g. 15 December)
5th Quarterly Installment:	120 days after the end of your accounting year (e.g. 30th April)