calculation VAT and TTC

[hanen91-ch]

Hi everybody,
would you like to help me, i have a problem about modifying the VAT calculation and the VAT amount.
I explain how I want to modify them.
for example :
HT = 10.000
TAX 2 (1%) = 0.100
VAT (19%) = (mnt HT + TAX2) * 19%
TTC = HT + TAX2 + VAT

[eldy]

It is really not common to have the VAT calculation that include the TAX 2. This opposite occurs in a lot of country but this cas is the first time. What is your country ? What is the name of the Tax2 in your country ? Are you sure it is not the opposite:
HT = 10.000
VAT (19%) = mnt HT * 19% = 1.9
TAX 2 (1% of HT +VAT) = 0.19
TTC = HT + TAX2 + VAT
Result for HT and TTC should be same but repartition between VAT and TAX2 will differ.

[hanen91-ch]

Thank you for your return, my country is tunisia, and my second tax is the fodec (1%). And for the calculation it is sure as I have already said.
HT = 10,000
TAX 2 (1% HT) = 0.100
VAT (19%) = (mnt HT + TAX2) * 19% = 1.919
TTC = HT + TAX2 + VAT

[eldy]

OK. The following page is speaking about this trouble (in french):
https://wiki.dolibarr.org/index.php/R%C3%A8gles_de_calcul_et_arrondi_de_TVA#Pour_la_Tunisie

[dolibit-ut]

if you add all the taxes to the net amount, the order doesn't matter:

net/ht = 100
1% 100 * 0.01 = 1
19% 100 * 0.19 = 19
Summe/total = 120

and if you have to add/mutliply one tax to the other it also shouldn't matter:

A)
net/ht = 100

• Tax1 ( 1%) 100 * 1.01 = 101,00
• Tax2 ( 19%) 101 * 1.19 = 120,19

B)
net/ht = 100

• Tax1 ( 19%) 100 * 1.19 = 119,00
• Tax2 ( 1%) 119 * 1.01 = 120,19

always the same result

[hanen91-ch]

Salut à tous,
merci à vos idées, mais je veux juste savoir ou se fait exactement le calcul de tva si on utilise un 2éme taxe.
Merci à vous.

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