What I should do when I post correct amount in annexure II and filled wrong amount monthly return?

For Sale


If it sales show as sales return and reverse vat out put. Make correct entry in annexure 2 that effect. 

For Purchase

Correct the wrong entry in the form I annexure. 
Next month give a reverse if its a purchase put it in purchase return and input to that effect. 
Give correct data in annexure 1 . 



Now the figure will tally. Make a note of the correction so made in a paper and file along with your Form I for future reference.