Subsequent debit tax calculating wrong

Question

dear guru
while doing subsequent debit for the vendor the Excise duty is calculating wrong
my issue is like this
i have purchase 100 quty with value 10/kg total amount is 1000 for that
ED is calculated 140
Ecess calculated 3
S&H calculated 1
i have done goods receipt and posted invoice also
now i that part of the quantit i have returne
lets 50 kg i have retune for that MIRO,MIGO,JIS,J1iV i have done
next vendor will send the suplimentry invocie because the rate is increase for that 50 quantiy, for that i will do J1IH for the additional excise and i will do MIRO subsequent debit for the rate increse in miro the tax amount is calculating wrong, ie
lets for 50 quantity total amoun increased 100
ed should calculate 14 but it is calculating 28
for that i have to apply any note
pl tell me urgent
thanks
regards
jrp

Answer 1

My understanding about the Input Tax and Output Tax was wrong. In the issue reported
Input Tax Calculation should be:
Vendor A/C.............. Cr 30000-
Expense A/C............ Dr 29100
Input Tax A/C............ Dr 900 (@3% on 30000)---my understanding was wrong.
Input Tax 3% should be charged on Expense amount, in this case Rs 30000. But because in the editing option calculate tax on net amount option was not selected, hence SAP was giving the below entry, which is correct as well.
Vendor A/C.............. Cr 30000-
Expense A/C............ Dr 29126.21
Input Tax A/C............ Dr 873.79 (@3% on 29126.21) which is correct.
Hence, the Vendor amount should be Expense + Input Tax= 30000 * 3%=900 + 30000 (expense) = 30900.
Correct Entry should be:
Vendor A/C...............Cr 30900
Expense A/C............Dr 30000
Input Tax A/C............Dr 900
Resolved. Pankaj has given the correct answer.